what is the citation in research

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When starting your first research work, you will find that citations play one of the central roles in building originality, credibility, and respect for both your work and intellectual property in general. Understanding what a citation is and how to use it effectively is fundamental for anyone engaging in scholarly writing.

Definition of a Citation

A citation is a formal reference to a source from which information or ideas have been drawn. I t is a way to credit the original author and to provide the readers with the necessary information to find the source themselves. Citations are vital in academic writing as they lend support and credibility to the writer’s own ideas and arguments, and they can be created via a free citation generator .

The Role of Citations in Scholarly Work

Creating citations is an inseparable part of academic writing, primarily serving as a guard against the unethical practice of plagiarizing. Plagiarism is the act of using another person’s work or ideas without giving them due credit, and it is considered a serious offense in the academic world. Citing sources demonstrates that writers respect the original author’s intellectual property and acknowledge their contribution to the field.

Moreover, citations illustrate that the writer has engaged in extensive research, adding depth and credibility to their work. They act as a roadmap, allowing readers to follow the trail of research and thought processes that led to the conclusions drawn in the paper. This transparency contributes to the audience’s understanding and allows them to verify the data and ideas presented, making sure the integrity and reliability of the scholarly discourse. Therefore, citations are essential to maintaining the honesty and trustworthiness of academic communication.

Types of Citations

Understanding the different types of citations is key to crafting well-researched and credible work. Each citation style, whether it’s APA, MLA, or Chicago, serves a specific purpose and follows distinct guidelines that build clarity and uniformity in academic communication. From in-text citations that subtly acknowledge sources within your narrative, to detailed bibliographies that offer a comprehensive overview of your research, mastering these various forms enhances the integrity and impact of your writing.

In-text Citations

In-text citations are integral to most academic writing formats. An example of an in-text citation in APA style is:

> (Smith, 2020).

This format briefly acknowledges the source within the text, typically featuring the author’s last name and the publication year. The purpose of in-text citations is to point the reader towards the more detailed reference list entry, allowing them to easily locate the full source details without cluttering the main text with extensive information.

Reference List Citations

Reference list citations are found at the end of an academic paper and provide comprehensive details about each source. For instance, a typical APA reference list entry might look like:

> Smith, J. (2020). Title of the Work . Publisher.

This format includes the author’s name, publication year, title of the work, and publisher details. The reference list ensures that every source mentioned in the in-text citations is accounted for, with sufficient information for the reader to find the original work.

Footnotes and Endnotes

Footnotes and endnotes serve as supplemental tools for citations or additional comments. An example of a footnote in Chicago style might appear as a superscript number within the text, with the corresponding note at the bottom of the page:

> ¹Smith, Title of the Work , 45.

Footnotes are found at the bottom of the page where the reference is made, while endnotes appear collectively at the end of the chapter or document. They can include full citation details or additional insights related to the content, providing further depth and context to the main text.

Citation Styles and Formats

Common Issues and Mistakes in Citation

In the world of academic writing, navigating the intricacies of citation can often be challenging, and it’s all too easy to stumble into common pitfalls. Incorrect citation format is a frequent error, where writers might mix up the requirements of different citation styles, such as confusing APA with MLA. This can lead to confusion and misinterpretation of the source material. Another common issue is missing information in citations, like omitting the publication date or the publisher’s name. This lack of detail can make it difficult for readers to locate the original sources, thereby affecting the paper’s reliability.

Inconsistency in citation styles throughout a document is another area where writers often err. For instance, using APA style in one section and then inadvertently switching to Chicago style in another can create a disjointed reading experience. Such inconsistencies not only disrupt the flow of your writing but also question its scholarly rigor . To maintain the integrity and credibility of your work, it is crucial to be thorough and consistent in your citation practices, carefully adhering to the rules of the chosen citation style. Remember, in the realm of academic writing, precision, and attention to detail in citations are as important as the content itself.

Citations are more than just formalities. They are a testament to a writer’s integrity, attention to detail, and engagement with the scholarly community. Proper citation practices honor the originality of ideas while building a reliable and verifiable body of knowledge. As such, mastering the art of citation is a key skill in academic writing.

What information should be included in a citation?

A citation should typically include the author’s name, the title of the work, publication date, and other relevant details like the publisher’s name, journal title, volume and issue numbers, and page numbers. For digital sources, URLs or DOIs (Digital Object Identifiers) are also essential.

Can I use online citation generators?

Yes, online citation generators can be used and are quite helpful in automating the citation process. However, it’s important to double-check the generated citations for accuracy, as these tools can sometimes make errors or be outdated in terms of citation style guidelines.

What are the consequences of not citing sources?

Not citing sources can lead to accusations of plagiarism, which is a serious academic offense. It can result in various consequences ranging from loss of credibility and academic penalties to legal repercussions. Proper citation is essential to maintain the integrity and reliability of your work.

Is there a difference between citing books and websites?

Yes, there is a difference in citing books and websites. Book citations typically require the author’s name, book title, publisher, and publication year. Website citations, however, often include the author’s name, title of the web page or article, the name of the website, the publication date, and the URL or DOI.

When do I need to use in-text citations?

In-text citations are used whenever you quote, paraphrase, or refer to information from a source in the body of your text. These citations provide a brief acknowledgment of the source, typically including the author’s last name and publication year, which correspond to a more detailed entry in the reference list or bibliography.

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Research Skills Tutorial

• Turning A Topic Into A Research Question
• Getting Background Information About Your Topic
• Portfolio Activity 1
• Types of Information Sources
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• Primary, Secondary and Tertiary Information Sources
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• Information Sources for Different Audiences and Purposes
• Portfolio Activity 2
• Library Databases vs. the Web
• Creating a Concept Chart
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• Portfolio Activity 4
• Credible Sources
• What Does the Information Source Tell You About Itself?
• Reliability
• Some More About Validity
• Portfolio Activity 5
• What Is Citing?
• What Is a Citation?
• Citation Styles
• Citing Tools and Tips
• Practice Activity 6
• Practice Activity 7 - Final Project

What Is A Citation?

When to cite.

A citation is a reference to the source of information used in your research. Any time you directly quote, paraphrase or summarize the essential elements of someone else's idea in your work, an in-text citation should follow. An in-text citation is a brief notation within the text of your paper or presentation which refers the reader to a fuller notation, or end-of-paper citation , that provides all necessary details about that source of information. Direct quotations should be surrounded by quotations marks and are generally used when the idea you want to capture is best expressed by the source.  Paraphrasing and summarizing involve rewording an essential idea from someone else's work, usually to either condense the point or to make it better fit your writing style. You do not have to cite your own ideas, unless they have been published. And you do not have to cite  common knowledge , or information that most people in your audience would know without having to look it up.

In-Text Citations

In-text citations alert the reader to an idea from an outside source.  

Parenthetical Notes

In MLA and APA styles, in-text citations usually appear as parenthetical notes (sometimes called parenthetical documentation ). They are called parenthetical notes because brief information about the source, usually the author's name, year of publication, and page number, is enclosed in parentheses as follows:  

MLA style: (Smith 263)

APA style: (Smith, 2013, p. 263)  

Parenthetical notes are inserted into the text of the paper at the end of a sentence or paragraph:>

In MLA and APA styles, in-text citations are associated with end-of-paper citations that provide full details about an information source. Note: Different source types and situations require different information within the parentheses. Refer to a style guide for the style you are using for details.

Note Numbers

In Chicago and CSE styles, in-text citations usually appear as superscript numerals, or note numbers , as follows:

These note numbers are associated with full citations that can appear as footnotes (bottom of page), endnotes (end of chapter or paper), or lists of cited references at the end of the paper.  

End-of-Paper Citations

End-of-paper citations, as well as footnotes and endnotes, include  full details about a source of information.  Citations contain different pieces of identifying information about your source depending on what type of source it is. In academic research, your sources will most commonly be articles from scholarly journals, and the citation for an article typically includes:  

• article title
• publication information (journal title, date, volume, issue, pages, etc.)
• DOI (digital object identifier).
• URL of the information source itself
• URL of the journal that published the article

There are many other types of sources you might use, including books, book chapters, films, song lyrics, musical scores, interviews, e-mails, blog entries, art works, lectures, websites and more. To determine which details are required for a citation for a particular source type, find that source type within the style guide for the citation style you are using. At the end of your research paper, full citations should be listed in order according to the citation style you are using:

• In MLA style, this list is called a W orks Cited page.  
• In APA style, it is called a References page.
• In CSE style, it is called a C ited References page.
• And, in Chicago style, there may be both a Notes page and a Bibliography page. 

Citations  In Library Databases

When you search the library's databases for articles or e-books, the list of search results you see is actually a list of full citations. Instead of being formatted according to MLA, APA, CSE, or Chicago style, these citations are formatted according to the database vendor's style. It is up to you to take the source information you find in a library database (or elsewhere) and format it according to the citation style you are using.

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Citing sources: Overview

• Citation style guides

Manage your references

Use these tools to help you organize and cite your references:

• Citation Management and Writing Tools

If you have questions after consulting this guide about how to cite, please contact your advisor/professor or the writing and communication center .

Why citing is important

It's important to cite sources you used in your research for several reasons:

• To show your reader you've done proper research by listing sources you used to get your information
• To be a responsible scholar by giving credit to other researchers and acknowledging their ideas
• To avoid plagiarism by quoting words and ideas used by other authors
• To allow your reader to track down the sources you used by citing them accurately in your paper by way of footnotes, a bibliography or reference list

About citations

Citing a source means that you show, within the body of your text, that you took words, ideas, figures, images, etc. from another place.

Citations are a short way to uniquely identify a published work (e.g. book, article, chapter, web site).  They are found in bibliographies and reference lists and are also collected in article and book databases.

Citations consist of standard elements, and contain all the information necessary to identify and track down publications, including:

• author name(s)
• titles of books, articles, and journals
• date of publication
• page numbers
• volume and issue numbers (for articles)

Citations may look different, depending on what is being cited and which style was used to create them. Choose an appropriate style guide for your needs.  Here is an example of an article citation using four different citation styles.  Notice the common elements as mentioned above:

Author - R. Langer

Article Title - New Methods of Drug Delivery

Source Title - Science

Volume and issue - Vol 249, issue 4976

Publication Date - 1990

Page numbers - 1527-1533

American Chemical Society (ACS) style:

Langer, R. New Methods of Drug Delivery. Science 1990 , 249 , 1527-1533.

IEEE Style:

R. Langer, " New Methods of Drug Delivery," Science , vol. 249 , pp. 1527-1533 , SEP 28, 1990 .

American Psychological Association   (APA) style:

Langer, R. (1990) . New methods of drug delivery. Science , 249 (4976), 1527-1533.

Modern Language Association (MLA) style:

Langer, R. " New Methods of Drug Delivery." Science 249.4976 (1990) : 1527-33.

What to cite

You must cite:

• Facts, figures, ideas, or other information that is not common knowledge

Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.

Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

Avoiding plagiarism

Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission.

Plagiarism is a very serious offense. If it is found that you have plagiarized -- deliberately or inadvertently -- you may face serious consequences. In some instances, plagiarism has meant that students have had to leave the institutions where they were studying.

The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

Some useful links about plagiarism:

• MIT Academic Integrity Overview on citing sources and avoiding plagiarism at MIT.
• Avoiding Plagiarism From the MIT Writing and Communication Center.
• Plagiarism: What It is and How to Recognize and Avoid It From Indiana University's Writing Tutorial Services.
• Plagiarism- Overview A resource from Purdue University.
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• Last Updated: Jan 16, 2024 7:02 AM
• URL: https://libguides.mit.edu/citing

What Are Citations?

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Last updated April 2018

Why Are Citations Important?

What Does a Citation Look Like?

A citation is typically found in two places:, in-text citations.

Reference Lists/Bibliographies

Authors use in-text citations after they have paraphrased, summarized, quoted or otherwise used another author’s work. Examples of in-text citations include parentheses, footnotes or endnotes.

Reference Lists

A reference list includes information on all of the sources an author used. It can also be called a bibliography or works cited. Each item in the list includes information such as title, author and publication date. A reference list is usually listed at the end of a paper with the exception of footnotes which are at the bottom of each page.

Reading a Citation

Knowing how to read a citation in a reference list or bibliography will help you identify different types of sources that an author used in their research. You can use a reference list from another researcher to find related sources on your topic, or to find counterpoints to your research. Let’s look at citations for three common types of sources:

Reading Citations: Article Citations

A citation for an article can include:.

Why is this important?

The journal title is often what is listed in library catalogs.

How do you know if it is an article?

The presence of two titles (article and journal) are the biggest clue that this is an article. Volume Number and Issue Number are also big clues as books will not have those pieces in a citation.

Reading Citations: Book Citations

A citation for a book can include:.

Year, edition, format, and publisher help distinguish between versions.

How do you know if it is a book?

Reading Citations: Website Citations

A citation for a website can include:.

To find and verify a website, you need to know the URL. Since websites change frequently, knowing the date accessed is similar to knowing a publication date.

How do you know if it is a website?

The date accessed and the presence of a URL are the biggest clues that you are looking at a citation for a website.

Citation Styles

Different disciplines cite in different ways which means that there are many different citation styles.

Your professor or department will tell you what style to use.

Style guides, manuals and handbooks are available both in print and online.

Citation Guides at the University Libraries

Examples of Citation Styles: Article Citations

Examples of Citation Styles: Book Citations

Knowledge Check

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• Research Process
• Find Background Info
• Find Sources through the Library
• Evaluate Your Info
• Cite Your Sources
• Evaluate, Write & Cite

• is the right thing to do  to give credit to those who had the idea
• shows that you have read and understand  what experts have had to say about your topic
• helps people find the sources  that you used in case they want to read more about the topic
• provides   evidence  for your arguments
• is professional and  standard practice   for students and scholars

What is a Citation?

A citation identifies for the reader the original source for an idea, information, or image that is referred to in a work.

• In the body of a paper, the  in-text citation  acknowledges the source of information used.
• At the end of a paper, the citations are compiled on a  References  or  Works Cited  list. A basic citation includes the author, title, and publication information of the source. 

From:  Lemieux  Library,  University  of Seattle 

Why Should You Cite?

Quoting Are you quoting two or more consecutive words from a source? Then the original source should be cited and the words or phrase placed in quotes. 

Paraphrasing If an idea or information comes from another source,  even if you put it in your own words , you still need to credit the source.  General vs. Unfamiliar Knowledge You do not need to cite material which is accepted common knowledge. If in doubt whether your information is common knowledge or not, cite it. Formats We usually think of books and articles. However, if you use material from web sites, films, music, graphs, tables, etc. you'll also need to cite these as well.

Plagiarism is presenting the words or ideas of someone else as your own without proper acknowledgment of the source. When you work on a research paper and use supporting material from works by others, it's okay to quote people and use their ideas, but you do need to correctly credit them. Even when you summarize or paraphrase information found in books, articles, or Web pages, you must acknowledge the original author.

Citation Style Help

Helpful links:

• MLA ,  Works Cited : A Quick Guide (a template of core elements)
• CSE  (Council of Science Editors)

For additional writing resources specific to styles listed here visit the  Purdue OWL Writing Lab

Citation and Bibliography Resources

• How to Write an Annotated Bibliography
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The land on which we gather is the unceded territory of the Awaswas-speaking Uypi Tribe. The Amah Mutsun Tribal Band, comprised of the descendants of indigenous people taken to missions Santa Cruz and San Juan Bautista during Spanish colonization of the Central Coast, is today working hard to restore traditional stewardship practices on these lands and heal from historical trauma.

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Citing Your Sources

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What is a Citation?

A  citation  is a reference that allows you to acknowledge the sources* you use in a formal academic paper, and enables a reader to locate those sources through the key information it provides.

Citations are placed both in the text and in an organized list at the end of the text. The format of the citations can vary depending on the citation style that is used. If a footnote or endnote system is used, citations can be self-contained without an organized list.

*Source material might come from books, journal articles, speeches, websites, on-line articles, films, government publications, legal proceedings, maps, and so on.

It is important to cite when borrowing the ideas and thoughts of others for several reasons.

Citing sources

• builds credibility in your work by showing you are not alone in your opinions;
• gives you a chance to show that you have thought about and investigated your topic;
• gives your reader the information he or she needs to verify your source or to find more information on the subject; and
• allows you to give credit where credit is due.

Not citing your sources is academically dishonest and may lead to charges of plagiarism.

In addition, citations are integral to scholarly literature. The scholarly literature on a topic is like a huge conversation that can include many experts from around the world and across the centuries. When an individual writer credits his sources, he ties his work to the larger scholarly discourse. Because citations identify intellectual links throughout scholarly literature, they can be helpful not only when writing but also when conducting research.

Citations enable you as a researcher to

• verify the facts and opinions set forth in a piece of writing;
• identify additional sources that may delve more deeply into a subject;
• distinguish the ideas of various experts regarding a specific topic;
• measure the influence of one thinker upon another; and
• trace the evolution of an idea as it passes from scholar to scholar, from culture to culture, and from era to era.
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How to use and create Citations

• What are citations?
• Citation management software
• Tutorials for citation management software

If you need any assistance, please contact the library staff at the Georgia Tech Library Help website . 

What are citations, and why are they important?

What is a citation.

A citation, also known as a reference, is a direct, specific description of a particular work. Each citation usually includes the date of creation or publication, the creator's name, and the title of the work.

Why use citations?

• It protects you against accidental plagiarism. When you give creators credit for their work through citation, you are not plagiarizing their ideas. 
• It creates authority for your ideas. If you use the work of experts to support your ideas, your arguments are stronger. 
• It gives your reader or audience an opportunity to learn more.

How do I use citations?

There are many different citation styles. Most citations have an in-text citation in the body of your writing and a list at the end of the document of all the citations. The most common for the scientific disciplines is APA. Social sciences and the humanities may use the Chicago Style or MLA. Your professor will tell you which to use. 

The Georgia Tech Library recommends the Purdue OWL online guide to citation styles. It is extensive and free for anyone to use. It can be found at Purdue OWL .

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• Last Updated: Jun 13, 2024 4:02 PM
• URL: https://libguides.library.gatech.edu/how-to-use-citations

What Is a Citation?

Definition, Styles, and Examples

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In any research paper, you draw on the work of other researchers and writers, and you must document their contributions by citing your sources, say Diana Hacker and Nancy Sommers in "A Pocket Style Manual, Eighth Edition." Citations, then, are the means by which you credit other researchers and writers when you use their work in your papers. Understanding how to cite sources can be tricky, particularly since there are different styles for writing papers , including the American Psychological Association, Modern Language Association, and Chicago (Turabian) styles. Electronic sources also come with their own specific citation rules in each of these styles. It's important to learn proper citation styles to avoid  plagiarism  in your research papers.

APA Citations

American Psychological Association (APA) style is often used in social sciences and other disciplines. With APA or any of the styles listed in this paper, you need to use a citation if you quote text from another source, paraphrase an author or authors' ideas, or refer to her work, such as a study, original thinking, or even an elegant turn of phrase. When you cite a source, you can't simply repeat most of the words from the work to which you are referring. You have to put the ideas into your own words, or you need to quote the text directly.

There are two parts to citations for APA and other styles: the short-form in line, which directs readers to a full entry at the end of a chapter or book. An in-line citation differs from a footnote, which is a note placed at the bottom of a page. An in-line citation—also called the  in-text citation —is placed within a line of text. To create an in-line citation, cite the name of the author and the date (in parentheses) of the article, report, book, or study, as this example from "A Pocket Style Manual" shows:

Cubuku (2012) argued that for a student-centered approach to work, students must maintain "ownership for thier goals and activities" (p. 64).

Note how you list the page number at the end of the in-text citation in parentheses followed by a period (if it is at the end of a sentence). If there are two authors, list the last name of each, as in:

"According to Donitsa-Schmidt and Zurzovsky (2014), ..."

If there are more than two authors, list the last name of the first author followed by the words "et al.," as in:

Herman et al. (2012) tracked 42 students over a three-year period (p. 49).

At the end of your paper, attach one or more pages titled "References." That section is essentially your biography. Readers of your paper can then turn to the references listing to read the full citations for each of the works you cited. There are actually many variations for references citations depending, for example, on whether you are citing a book, journal article, or newspaper story, or the many different kinds of media, including audio recordings and film.

the most common citation is to books. For such a citation, list the last name of the author, followed by a comma, followed by the first initial(s) of the author(s), followed by a period. You would put the year the book was published in parentheses followed by a period, then the title of the book in italics using sentence case , followed by a comma, the place of publication, followed by a colon, and then the publisher, followed by a period. "A Pocket Style Manual" gives this example:

Rosenberg, T. (2011). Join the club: How peer pressure can transform the world . New York, NY: Norton.​

Though the citations here won't print this way, use a hanging indent for the second and any subsequent lines in each citation. In a hanging indent in APA style, you indent every line after the first.

MLA Citations

MLA style is often used in English and other humanities papers. MLA follows the author-page style for in-text citations, notes Purdue OWL, an excellent citation, grammar, and writing website operated by Purdue University. Purdue gives this example of an in-text citation, which is also called parenthetical citation in MLA style. Note that in MLA style, page numbers don’t typically appear unless the sentence or passage is a direct quote from the original, as is the case here:

Romantic poetry is characterized by the "spontaneous overflow of powerful feelings" (Wordsworth 263).

At the end of the paper, attach a "Works Cited" page or pages, which is equivalent to the "References" section in APA style. "Works Cited" section citations are very similar in MLA and APA style, as in this example of a work with multiple authors from Purdue OWL:

Warner, Ralph, et al.  How to Buy a House in California . Edited by Alayna Schroeder, 12th ed., Nolo, 2009.

Note that you would also use a hanging indent in MLA, but it tends to be a bit shorter; move the second and subsequent lines in by three spaces. Spell out the first name of the author(s) in MLA style; add a comma before "et al."; use title case for the book, journal, or article title; omit the place of publication information; follow the name of the publisher with a comma; and list the date of publication at the end.

Chicago Style Citations

Chicago is the oldest of the three major writing and citation styles in the United States, having begun with the 1906 publication of the first Chicago style guide. For in-text citations, Chicago style, which comes from the "Chicago Manual of Style" from the University of Chicago Press, is pretty simple: the author's last name, date of publication, a comma, and page numbers, all in parentheses, as follows:

(Murav 2011, 219-220)

At the end of the paper, insert a list of references, which in Chicago style is called a bibliography. Books, journals, and other articles are cited in a manner similar to APA and MLA style. List the author's last name, a comma, and the full first name, followed by the title of the book in italics and title case, the place of publication, followed by a colon, followed by the publisher's name, a comma, and the date of publication, all in parentheses, followed by a comma and the page numbers.

Kate L. Turabian, in "A Manual for Writers" (a student-geared version of Chicago style), gives the following example:

Gladwell, Malcolm,  The Tipping Point: How Little Things Can Make a Big Difference  (Boston: Little Brown, 2000), 64-65.

You also use a hanging indent in the bibliography section of a Chicago style paper, with the indent moved in three spaces. For article or journal titles, list the title in regular (not italic) type encased in quotation marks.

Electronic Sources

Electronic source citations are similar to citations of published works except for two issues: You need to include the URL of the source, and a large percentage of online sources may not list an author. 

In APA style, for example, list an online source in the same way you would cite a book or article, except that you need to include the type of information you are accessing (in parentheses), as well as the URL. If the online source lacks a listed author, start with the name of the group or agency providing the information. "A Pocket Manual of Style" provides the following example of an APA electronic source citation:

U.S. Department of Agriculture, Economic Research Service. (2011). Daily intake of nutrients by food source: 2005-08 . ​[Data set]. Retrieved from http:www.ers.usda.gov/data-products/food-consumption-and-nutrient-intakes.aspx.

As with other citations, use a hanging indent for the second, third, and fourth lines of this source. For Chicago style, use the same method as described previously but add the URL, as in this example:

Brown, David. "New Burden of Disease Study Shows World's People Living Longer but with More Disability," Washington Post , December 12, 2012. http://www.washingtonpost.com/.

Note that Chicago style includes only the home-page URL and not the full URL; that can change, however, from one regime to the next.

MLA style used to require you to list the date you accessed the information, but that's no longer the case. To cite an electronic source, use the same style as discussed previously, but replace the period after the date with a comma and then list the URL.

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Citation Practices and Avoiding Plagiarism: Getting Started

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In the Citation Practices and Avoiding Plagiarism guide, you can:

• See examples of citations in different formats 
• Learn how to paraphrase correctly
• Make a plan to help avoid plagiarism
• Watch a video tutorial on citation practices
• Put your citation skills to the test with our Research Skills Trainer

... or get started by learning what citation is below.

What is citation?

Scholarly research incorporates ideas from many sources, and consequently, all scholarly research builds on the works of others. Scholars use the process of  citation  to clearly reveal just how they are relying on other people's work   

In short, proper citation does three things: 

It allows readers to evaluate the evidence that an author is using to support arguments in their paper. 

It shows related research and how that work is relevant.  It identifies scholars who influenced an author’s thinking and shows how an author’s work is situated in existing bodies of research.  

It gives credit to other scholars for their work and ideas.   

Failure to cite sources when necessary is called plagiarism, and it's considered a serious ethical breach.  As a new practitioner and author, you may have questions about proper ways to use the research of others and avoid plagiarism. 

This guide was created to answer those questions, and to point out additional resources (including librarians and offices outside of the library) to help you successfully engage with scholarly documentation.

Librarians can help you save time locating resources so you can spend more time engaging with the sources you find. Book an appointment for a research consultation with a subject specialist librarian.

Weingarten Learning Resources Center  can work with you to improve your time management and note taking skills.

The  Marks Family Writing Center  has a number of services that can help improve your writing style with particular issues and in general.

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Citation Guide

What is a citation, scholarly versus popular publications, citation components (credo), writing help.

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A citation is the way you tell your readers that certain material in your work came from another source and gives your readers the information necessary to find that source again. Citations may include: Information about the Author(s) or Editor(s).

• The Title of the work
• The Publisher
• The Date published
• The Page Numbers of the material you are referencing
• Why should I cite sources?

Giving credit to the original author by citing sources is the only way to use other people's work without plagiarizing. But there are a number of other reasons to cite sources:

• Citations are extremely helpful to anyone who wants to find out more about your ideas and where they came from.
• Not all sources are good or right for your project -- your own ideas may often be more accurate or interesting than those of your sources. Proper citation will keep you from taking the rap for someone else's bad ideas.
• Citing sources shows the amount of research you've done.
• Citing sources strengthens your work by lending outside support to your ideas.

Doesn't citing sources make my work seem less original?

Not at all. Citing sources actually helps your reader distinguish your ideas from those of your sources. This will emphasize the originality of your own work. It also gives you greater credibility because you are demonstrating your knowledge on the subject and your understanding of the work that's already been done by others on the subject.

When do I need to cite?

Whenever you borrow words or ideas from another source, you need to acknowledge that source. The following situations almost always require a citation:

• Whenever you use quotes
• Whenever you paraphrase
• Whenever you use an idea that someone else has already expressed
• Whenever you make specific reference to the work of another
• Whenever someone else's work has been critical in developing your own ideas
• How to tell the difference between Scholarly, Popular and Trade publications
• Search engines vs. databases A video explaining the difference between using a search engine versus a database for scholarly research.
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• Citation Components APA and MLA aren't just your instructor's way of punishing you. These style guides ensure you give proper credit and avoid plagiarism.

The Limestone University OWL (online writing lab) is the virtual extension of the Writing Center on the main campus. The LU OWL offers live peer tutorial sessions to all students. On campus students may visit the Writing Lab in person. 

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Citation Styles

• Citation Basics

What is a Citation?

A citation is the basic information required to identify and locate a specific source, e.g. book, book chapter, article, website, video, etc.

What is a Citation Style?

Different academic disciplines have specific guidelines for organizing material and citing sources. These rules are published as style manuals . While each citation system is distinct, the underlying rationale is the same–to facilitate written communication among members in a scholarly community.

Parts of a Citation *

• Book: Author Name . Title . Publisher, Year. 

Example: Macfarlane, Bruce. Researching with Integrity: The Ethics of Academic Enquiry . Routledge, 2009. 

• Book Chapter: Author Name. “Chapter Title.” Book Title. Editor, Publisher, Year, Chapter Page Numbers.

Example: Tan, Amy. “Yes and No.” The Genius of Language: Fifteen Writers Reflect on Their Mother Tongues, edited by Wendy Lesser, Pantheon Books, 2004, pp. 25-34.

• Journal Article: Author Name . “Article Title.” Journal Title, Volume Number, Issue Number , Year, Article Page Numbers.

Example: Hess, Mickey. “Was Foucault A Plagiarist? Hip-Hop Sampling And Academic Citation.” Computers & Composition, vol. 23, no. 3, 2006, pp. 280-295.

• Website: Author Name. “Title of Page/Work.” Title of Website, Date of Publication, Location.

Example: Calonia, Jennifer. “How to Avoid Plagiarism.” Grammerly Blog, 21 Aug 2019, https://www.grammarly.com/blog/5-most-effective-methods-for-avoiding-plagiarism .

*The order and punctuation of the citation components are dictated by the style you use (above are formatted in MLA).

What is a DOI?

Digital Object Identifiers (DOIs) are unique identifiers that may be assigned to published articles and other works. Their purpose is ensure persistent access to online content. If a DOI is available, you should include it in your citation.

APA: Clark, D. A., & Murphy, W. (2021). The efficacy of a classroom game for teaching APA style citation. Teaching of Psychology , 48 (3), 209–214. https://doi.org/10.1177/0098628320977263

MLA: Clark, Daniel A., and Walter Murphy. “The Efficacy of a Classroom Game for Teaching APA Style Citation.” Teaching of Psychology , vol. 48, no. 3, July 2021, pp. 209–14. Sage Journals , https://doi.org/10.1177/0098628320977263.

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Organizing Your Social Sciences Research Paper

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A citation is a formal reference to a published or unpublished source that you consulted and obtained information from while writing your research paper. It refers to a source of information that supports a factual statement, proposition, argument, or assertion or any quoted text obtained from a book, article, web site, or any other type of material . In-text citations are embedded within the body of your paper and use a shorthand notation style that refers to a complete description of the item at the end of the paper. Materials cited at the end of a paper may be listed under the heading References, Sources, Works Cited, or Bibliography. Rules on how to properly cite a source depends on the writing style manual your professor wants you to use for the class [e.g., APA, MLA, Chicago, Turabian, etc.]. Note that some disciplines have their own citation rules [e.g., law; medicine].

Citations: Overview. OASIS Writing Center, Walden University; Research and Citation. The Writing Lab and The OWL. Purdue University; Citing Sources. University Writing Center, Texas A&M University.

Citing Your Sources

Reasons for Citing Sources in Your Research Paper

English scientist, Sir Isaac Newton, once wrote, "If I have seen further, it is by standing on the shoulders of giants.”* Citations support learning how to "see further" through processes of intellectual discovery, critical thinking, and applying a deliberate method of navigating through the scholarly landscape by tracking how cited works are propagated by scholars over time and the subsequent ways this leads to the devarication of new knowledge.

Listed below are specific reasons why citing sources is an important part of doing good research.

• Shows the reader where to find more information . Citations help readers expand their understanding and knowledge about the issues being investigated. One of the most effective strategies for locating authoritative, relevant sources about a research problem is to review materials cited in studies published by other authors. In this way, the sources you cite help the reader identify where to go to examine the topic in more depth and detail.
• Increases your credibility as an author . Citations to the words, ideas, and arguments of scholars demonstrates that you have conducted a thorough review of the literature and, therefore, you are reporting your research results or proposing recommended courses of action from an informed and critically engaged perspective. Your citations offer evidence that you effectively contemplated, evaluated, and synthesized sources of information in relation to your conceptualization of the research problem.
• Illustrates the non-linear and contested nature of knowledge creation . The sources you cite show the reader how you characterized the dynamics of prior knowledge creation relevant to the research problem and how you managed to identify the contested relationships between problems and solutions proposed among scholars. Citations don't just list materials used in your study, they tell a story about how prior knowledge-making emerged from a constant state of creation, renewal, and transformation.
• Reinforces your arguments . Sources cited in your paper provide the evidence that readers need to determine that you properly addressed the “So What?” question. This refers to whether you considered the relevance and significance of the research problem, its implications applied to creating new knowledge, and its importance for improving practice. In this way, citations draw attention to and support the legitimacy and originality of your own ideas and assertions.
• Demonstrates that you "listened" to relevant conversations among scholars before joining in . Your citations tell the reader where you developed an understanding of the debates among scholars. They show how you educated yourself about ongoing conversations taking place within relevant communities of researchers before inserting your own ideas and arguments. In peer-reviewed scholarship, most of these conversations emerge within books, research reports, journal articles, and other cited works.
• Delineates alternative approaches to explaining the research problem . If you disagree with prior research assumptions or you believe that a topic has been understudied or you find that there is a gap in how scholars have understood a problem, your citations serve as the source materials from which to analyze and present an alternative viewpoint or to assert that a different course of action should be pursued. In short, the materials you cite serve as the means by which to argue persuasively against long-standing assumptions promulgated in prior studies.
• Helps the reader understand contextual aspects of your research . Cited sources help readers understand the specific circumstances, conditions, and settings of the problem being investigated and, by extension, how your arguments can be fully understood and assessed. Citations place your line of reasoning within a specific contextualized framework based on how others have studied the problem and how you interpreted their findings in support of your overall research objectives.
• Frames the development of concepts and ideas within the literature . No topic in the social and behavioral sciences rests in isolation from research that has taken place in the past. Your citations help the reader understand the growth and transformation of the theoretical assumptions, key concepts, and systematic inquiries that emerged prior to your engagement with the research problem.
• Underscores sources that were most important to you . Your citations represent a set of choices made about what you determined to be the most important sources for understanding the topic. They not only list what you discovered, but why it matters and how the materials you chose to cite fit within the broader context of your research design and arguments. As part of an overall assessment of the study’s validity and reliability , the choices you make also helps the reader determine what sources of research may have been excluded.
• Provides evidence of interdisciplinary thinking . An important principle of good research is to extend your review of the literature beyond the predominant disciplinary space where scholars have previously examined a topic. Citations provide evidence that you have integrated epistemological arguments, observations, and/or methodological strategies of other disciplines into your paper, thereby demonstrating that you understand the complex, interconnected nature of contemporary research topics.
• Forms the basis for bibliometric analysis of research . Bibliometric analysis is a quantitative method used, for example, to identify and predict emerging trends in research, document patterns of collaboration among scholars, explore the intellectual structure of a specific domain of research, map the development of research within and across disciplines, or identify gaps in knowledge within the literature. Bibliometric data can also be used to visually map relationships among published studies. Citations to books, journal articles, research reports, and other publications represent the raw data used in bibliometric research.
• Reveals possible adherence to the principles of citational justice. Citational justice refers to equity in the inclusion of sources published by authors who are members of marginalized or underrepresented groups that are often under-cited because of their background, community of origin, identity, or location. In so doing, this movement “challenges entrenched hierarchies and biases in knowledge production.” ** Within this context, the sources cited in your paper can help the reader obtain a more inclusive divergency of voices and perspectives about how a research problem can be understood, contextualized, and investigated.
• Supports critical thinking and independent learning . Evaluating the authenticity, reliability, validity, and originality of prior research is an act of interpretation and introspective reasoning applied to assessing whether a source of information will contribute to understanding the problem in ways that are persuasive and align with your overall research objectives. Reviewing and citing prior studies represents a deliberate act of critically scrutinizing each source as part of your overall assessment of how scholars have confronted the research problem.
• Honors the achievements of others . As Susan Blum recently noted, *** citations not only identify sources used, they acknowledge the achievements of scholars within the larger network of research about the topic. Citing sources is a normative act of professionalism within academe and a way to highlight and recognize the work of scholars who likely do not obtain any tangible benefits or monetary value from their research endeavors. Your citations help to validate the work of others.

*Vernon. Jamie L. "On the Shoulder of Giants." American Scientist 105 (July-August 2017): 194.

**Dadze Arthur, Abena and Mary S. Mangai. "The Journal and the Quest for Epistemic Justice." Public Administration and Development 44 (2024): 11.

***Blum, Susan D. "In Defense of the Morality of Citation.” Inside Higher Ed , January 29, 2024.

Aksnes, Dag W., Liv Langfeldt, and Paul Wouters. "Citations, Citation Indicators, and Research Quality: An Overview of Basic Concepts and Theories." Sage Open 9 (January-March 2019): https://doi.org/10.1177/2158244019829575; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; D'Angelo, Barbara J. "Using Source Analysis to Promote Critical Thinking." Research Strategies 18 (Winter 2001): 303-309; Kwon, Diana. “The Rise of Citational Justice.” Nature 603 (March 24, 2022): 568-572; Donthu, Naveen et al. “How to Conduct a Bibliometric Analysis: An Overview and Guidelines.” Journal of Business Research 133 (2021): 285-296; Mauer, Barry and John Venecek. “Scholarship as Conversation.” Strategies for Conducting Literary Research, University of Central Florida, 2021; Öztürk, Oguzhan, Ridvan Kocaman, and Dominik K. Kanbach. "How to Design Bibliometric Research: An Overview and a Framework Proposal." Review of Managerial Science (2024): 1-29; Why Cite? Poorvu Center for Teaching and Learning, Yale University; Citing Information. The Writing Center. University of North Carolina; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; Newton, Philip. "Academic Integrity: A Quantitative Study of Confidence and Understanding in Students at the Start of Their Higher Education."  Assessment and Evaluation in Higher Education 41 (2016): 482-497; Referencing More Effectively. Academic Skills Centre. University of Canberra; Using Sources. Yale College Writing Center. Yale University; Vosburgh, Richard M. "Closing the Academic-practitioner Gap: Research Must Answer the “SO WHAT” Question." H uman Resource Management Review 32 (March 2022): 100633; When and Why to Cite Sources. Information Literacy Playlists, SUNY, Albany Libraries.

Structure and Writing Style

Referencing your sources means systematically showing what information or ideas you acquired from another author’s work, and identifying where that information come from . You must cite research in order to do research, but at the same time, you need to delineate what are your original thoughts and ideas and what are the thoughts and ideas of others. Citations establish the demarcation between each set of statements. Procedures used to cite sources vary among different fields of study. If not outlined in your course syllabus or writing assignment, always speak with your professor about what writing style for citing sources should be used for the class because it is important to fully understand the citation rules that should be used in your paper and to apply them consistently. If your professor defers and tells you to "choose whatever you want, just be consistent," then choose the citation style you are most familiar with or that is appropriate to your major [e.g., use Chicago style if you are majoring in history; use APA if its an education course; use MLA if it is a general writing course].

For examples of common citation styles, GO HERE .

GENERAL GUIDELINES

1. Are there any reasons I should avoid referencing other people's work? No. If placed in the proper context, r eferencing other people's research is never an indication that your work is substandard or lacks originality. In fact, the opposite is true. If you write your paper without adequate references to previous studies, you are signaling to the reader that you are not familiar with the literature on the topic, thereby, undermining the validity of your study and your credibility as a researcher. Including references in academic writing is one of the most important ways to demonstrate your knowledge and understanding of how the research problem has been addressed. It is the intellectual packaging around which you present your thoughts, ideas, and arguments to the reader.

2. What should I do if I find out that my great idea has already been studied by another researcher? It can be frustrating to come up with what you believe is a great topic for your paper only to discover that it's already been thoroughly studied. However, do not become frustrated by this. You can acknowledge the prior research by writing in the text of your paper [see also Smith, 2002], then citing the complete source in your list of references. Use the discovery of prior studies as an opportunity to demonstrate the significance of the problem being investigated and, if applicable, as a means of delineating your analysis from those of others [e.g., the prior study is ten years old and doesn't take into account new variables]. Strategies for responding to prior research can include: stating how your study updates previous understandings about the topic, offering a new or different perspective, applying a different or innovative method of gathering and interpreting data, and/or describing a new set of insights, guidelines, recommendations, best practices, or working solutions.

3. What should I do if I want to use an adapted version of someone else's work? You still must cite the original work. For example, you use a table of statistics from a journal article published in 1996 by author Smith, but you have altered or added new data to it. Reference the revised chart, such as, [adapted from Smith, 1996], then cite the original source in your list of references. You can also use other terms in order to specify the exact relationship between the original source and the version you have presented, such as, "based on data from Smith [1996]...," or "summarized from Smith [1996]...." Citing the original source helps the reader locate where the information was first presented and under what context it was used as well as to evaluate how effectively you adapted it to your own research.

4. What should I do if several authors have published very similar information or ideas? You can indicate that the topic, idea, concept, or information can be found in the works of others by stating something similar to the following example: "Though many scholars have applied rational choice theory to understanding economic relations among nations [Smith, 1989; Jones, 1991; Johnson, 1994; Anderson, 2003; Smith, 2014], little attention has been given to applying the theory to examining the influence of non-governmental organizations in a globalized economy." If you only reference one author or only the most recent study, then your readers may assume that only one author has published on this topic, or more likely, they will conclude that you have not conducted a thorough review of the literature. Referencing all relevant authors of prior studies gives your readers a clear idea of the breadth of analysis you conducted in preparing to study the research problem. If there has been a significant number of prior studies on the topic [i.e., ten or more], describe the most comprehensive and recent works because they will presumably discuss and reference the older studies. However, note in your review of the literature that there has been significant scholarship devoted to the topic so the reader knows that you are aware of the numerous prior studies.

5. What if I find exactly what I want to say in the writing of another researcher? In the social sciences, the rationale in duplicating prior research is generally governed by the passage of time, changing circumstances or conditions, or the emergence of variables that necessitate new investigations . If someone else has recently conducted a thorough investigation of precisely the same research problem that you intend to study, then you likely will have to revise your topic, or at the very least, review this literature to identify something new to say about the problem. However, if it is someone else's particularly succinct expression, but it fits perfectly with what you are trying to say, then you can quote from the author directly, referencing the source. Identifying an author who has made the exact same point that you want to make can be an opportunity to validate, as well as reinforce the significance of, the research problem you are investigating. The key is to build on that idea in new and innovative ways. If you are not sure how to do this, consult with a librarian .

6. Should I cite a source even if it was published long ago? Any source used in writing your paper should be cited, regardless of when it was written. However, in building a case for understanding prior research about your topic, it is generally true that you should focus on citing more recently published studies because they presumably have built upon the research of older studies. When referencing prior studies, use the research problem as your guide when considering what to cite. If a study from forty years ago investigated the same topic, it probably should be examined and considered in your list of references because the research may have been foundational or groundbreaking at the time, even if its findings are no longer relevant to current conditions or reflect current thinking [one way to determine if a study is foundational or groundbreaking is to examine how often it has been cited in recent studies using the "Cited by" feature of Google Scholar ]. However, if an older study only relates to the research problem tangentially or it has not been cited in recent studies, then it may be more appropriate to list it under further readings .

7. Can I cite unusual and non-scholarly sources in my research paper? The majority of the citations in a research paper should be to scholarly [a.k.a., academic; peer-reviewed] studies that rely on an objective and logical analysis of the research problem based on empirical evidence that reliably supports your arguments. However, any type of source can be considered valid if it brings relevant understanding and clarity to the topic. This can include, for example, non-textual elements such as photographs, maps, or illustrations. A source can include materials from special or archival collections, such as, personal papers, manuscripts, business memorandums, the official records of an organization, or digitized collections. Citations can also be to unusual items, such as, an audio recording, a transcript from a television news program, a unique set of data, or a social media post. The challenge is knowing how to cite unusual and non-scholarly sources because they often do not fit within consistent citation rules of books or journal articles. Given this, consult with a librarian if you are unsure how to cite a source.

NOTE:   In any academic writing, you are required to identify which ideas, facts, thoughts, concepts, or declarative statements are yours and which are derived from the research of others. The only exception to this rule is information that is considered to be a commonly known fact [e.g., "George Washington was the first president of the United States"] or a statement that is self-evident [e.g., "Australia is a country in the Global South"]. Appreciate, however, that any "commonly known fact" or self-evidencing statement is culturally constructed and shaped by specific social and aesthetical biases . If you have any doubt about whether or not a fact is considered to be widely understood knowledge, provide a supporting citation, or, ask your professor for clarification about whether the statement should be cited.

ANOTHER NOTE:   What is a foundational or groundbreaking study? In general, this refers to a study that investigated a research problem which , up to that point, had never been clearly defined or explained. If you trace a research topic back in time using citations as your guide, you will often discover an original study or set of studies that was the first to identify, explain the significance, and thoroughly investigate a problem. It is considered f oundational or groundbreaking because it pushed the boundaries of existing knowledge and influenced how researchers thought about the problem in new or innovative ways. Evidence of  foundational or groundbreaking research is the number of times a study has been subsequently cited, and continues to be cited, since it was first published.

Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Carlock, Janine. Developing Information Literacy Skills: A Guide to Finding, Evaluating, and Citing Sources . Ann Arbor, MI: University of Michigan Press, 2020; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; How to Cite Other Sources in Your Paper. The Structure, Format, Content, and Style of a Journal-Style Scientific Paper. Department of Biology. Bates College; Lunsford, Andrea A. and Robert Connors; The St. Martin's Handbook . New York: St. Martin's Press, 1989; Mills, Elizabeth Shown. Evidence Explained: Citing History Sources from Artifacts to Cyberspace . 3rd edition. Baltimore, MD: Genealogical Publishing Company, 2015; Research and Citation Resources. The Writing Lab and The OWL. Purdue University; Writing Tutorial Services, Center for Innovative Teaching and Learning. Indiana University; Why Cite? Poorvu Center for Teaching and Learning, Yale Univeraity.

Other Citation Research Guides

The following USC Libraries research guide can help you properly cite sources in your research paper:

• Citation Guide

The following USC Libraries research guide offers basic information on using images and media in research:

Listed below are particularly well-done and comprehensive websites that provide specific examples of how to cite sources under different style guidelines.

• Purdue University Online Writing Lab
• Southern Cross University Harvard Referencing Style
• University of Wisconsin Writing Center

This is a useful guide concerning how to properly cite images in your research paper.

• Colgate Visual Resources Library, Citing Images

This guide provides good information on the act of citation analysis, whereby you count the number of times a published work is cited by other works in order to measure the impact of a publication or author.

Measuring Your Impact: Impact Factor, Citation Analysis, and other Metrics: Citation Analysis [Sandy De Groote, University of Illinois, Chicago]

Automatic Citation Generators

The links below lead to systems where you can type in your information and have a citation compiled for you. Note that these systems are not foolproof so it is important that you verify that the citation is correct and check your spelling, capitalization, etc. However, they can be useful in creating basic types of citations, particularly for online sources.

• BibMe -- APA, MLA, Chicago, and Turabian styles
• DocsCite -- for citing government publications in APA or MLA formats
• EasyBib -- APA, MLA, and Chicago styles
• Son of Citation Machine -- APA, MLA, Chicago, and Turabian styles

NOTE:   Many companies that create the research databases the USC Libraries subscribe to, such as ProQuest , include built-in citation generators that help take the guesswork out of how to properly cite a work. When available, you should always utilize these features because they not only generate a citation to the source [e.g., a journal article], but include information about where you accessed the source [e.g., the database].

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Citation Help

What are citations, what is citing why is it important.

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Get help from a Librarian!

You can get help with your research, even when you can't come to campus!

Use the icon above to contact a reference librarian by chat or email. If chat is not available at the moment, email [email protected] , and a librarian will respond as quickly as possible.  Please allow at least 48 hours for responses to emails!

A citation , in college reading, writing, or speaking, is a reference to a source of information. The goal of all citations is to allow the audience (whether reading or listening) to identify and find the source of your information.  There are several different ways that information can be cited:

• In-text citation s are short notes that must be included with your text where the idea, data, or evidence from that source is used. In-text citations should match to a complete list of full citations, usually included as the last page of your paper.
• Verbal citations should be provided when you are giving a speech. You will need to mention the author and something about why the author is worthy of citing.
• Full citations provide all of the elements necessary for the reader to find the exact same source used by the writer. Full citations should be provided  for all the sources used or consulted in your research project. This will usually be in a list at the end of your paper called either a Works Cited list or References page.  It may also be on a separate sheet for speeches.

There are a variety of different formats that can be used for citations - MLA and APA are the two most commonly used at CR, but many other specialized styles exist as well.  Consult your assignment handout or ask your instructor which citation format you will be required to use. 

All citation styles will require you to include important elements from your source so that the reader can find that exact same source. Some of these important elements are author, title, publisher, place of publication, date of publication. APA and MLA styles format the citation elements slightly differently. Select the tab at the top of this guide for the style you need to find instructions, examples, and a PDF handout for that citation style that you can print.

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Identifying Parts of a Citation

• Identifying Types of Sources
• Why Citing Sources is Important

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Citing or documenting the sources used in your research serves three purposes:

• It gives proper credit to the authors of the words or ideas that you incorporated into your paper.
• It allows those who are reading your work to locate your sources, in order to learn more about the ideas that you include in your paper.
• Citing your sources consistently and accurately helps you avoid committing plagiarism in your writing.

If you cite a source in your bibliography simply like this:

http://0-search.proquest.com.library.anselm.edu/sciencejournals/docview/963513704/FCC731C646FD481FPQ/8?accountid=13640

it does technically indicate where you found it, and someone might be able to find it again. But :

• What if the URL breaks?
• What if your reader doesn't have access to Geisel Library's databases? (This is the URL to the PDF view of a journal article in the database ProQuest Science Journals.)

A good citation makes it easy for the reader to figure out the who, what, when, and where of the source. In MLA style, a citation also often indicates how it was accessed.

Within MLA style, the format of the citation also tells you "what"--that this source is a journal article that you accessed through an online database.

• Template courtesy of Nash Community College
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• Last Updated: Jul 22, 2024 9:34 AM
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• Citing Sources

Citing Sources: When should I use a citation?

A citation should be used when content that did not originate with you is used to support your writing.

Content includes:

• words (quotations, phrases, sayings, etc.)
• thoughts or ideas (summarizations and paraphrases)
• audio or visual material (photos, videos, screencaptures, powerpoint slides, social media content, audio recordings, etc.)

Here are a few pages from Excelsior OWL's guide to writing process to get you started:

• Summarizing sources
• Paraphrasing sources
• Using quotations

What you don't need to cite

No need to cite what is known as common knowledge.

But, what is common knowledge?  Common knowledge includes information that someone can easily trace and find the answer to.  In an academic context, common knowledge will depend on the audience, but here are some examples to get you started:

• There are 24 hours in a day.
• The President of the United States can serve up to two terms in office, each term lasting four years.
• The phone number for emergency services in the United States is 9-1-1

More examples of how to determine if something is common knowledge:

• Common Knowledge & Plagiarism (from Excelsior OWL)

When in doubt, cite --  You won’t be judged harshly for adding a citation when it isn’t needed.  However, skipping a citation (whether it’s an accident or not) could be considered plagiarism, which can have serious consequences.

• << Previous: What are citations and why should I use them?
• Next: Why are there so many citation styles? >>
• Last Updated: May 1, 2024 12:48 PM
• URL: https://guides.lib.uw.edu/research/citations

Have a language expert improve your writing

Run a free plagiarism check in 10 minutes, generate accurate citations for free.

• Knowledge Base
• Citing sources
• Citation examples for common sources types

Citation Examples | Books, Articles, Websites & More

Published on April 9, 2021 by Jack Caulfield . Revised on January 17, 2024.

The most common citation styles are APA and MLA . To cite a source in these styles, you need a brief in-text citation and a full reference.

Use the interactive tool to understand how a citation is structured and see examples for common source types .

As well as switching between styles and sources, you can explore how a citation looks when there are multiple authors, different editions, no publication date, and other common scenarios.

If you’re still not sure how to cite your source correctly, dive into our comprehensive articles. For each source type, we provide a range of examples in APA , MLA , and Chicago style .

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Caulfield, J. (2024, January 17). Citation Examples | Books, Articles, Websites & More. Scribbr. Retrieved September 9, 2024, from https://www.scribbr.com/citing-sources/citation-example/

Is this article helpful?

Jack Caulfield

Other students also liked, citation styles guide | examples for all major styles, apa vs. mla | the key differences in format & citation, how to avoid plagiarism | tips on citing sources, what is your plagiarism score.

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Writing a scientific paper.

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• INTRODUCTION

Literature Cited Section

Guides from other schools, citation styles & writing guides, "literature cited checklist" from: how to write a good scientific paper. chris a. mack. spie. 2018..

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This is the last section of the paper. Here you should provide an alphabetical listing of all the published work you cited in the text of the paper. This does not mean every article you found in your research; only include the works you actually cited in the text of your paper. A standard format is used both to cite literature in the text and to list these studies in the Literature Cited section.  Hypothetical examples of the format used in the journal Ecology are below:     Djorjevic, M., D.W. Gabriel and B.G. Rolfe. 1987. Rhizobium: Refined parasite of legumes. Annual Review of Phytopathology 25: 145-168.     Jones, I. J. and B. J. Green. 1963. Inhibitory agents in walnut trees. Plant Physiology 70:101-152.     MacArthur, R.H. and E.O. Wilson. 1967. The Theory of Island Biogeography. Princeton University Press, Princeton, N.J.     Smith, E. A. 1949. Allelopathy in walnuts. American Journal of Botany 35:1066-1071. Here is a dissection of the first entry, in the format for Ecology :       Firstauthor, M., D.W. Secondauthor and B.G. Thirdauthor. Year. Article title with only the first letter capitalized. Journal Article Title with Important Words in Caps  volume#(issue# if there is one): firstpage-lastpage. Notice some of the following details:       - the list is alphabetized;     - no first or middle names are listed (the author's first and middle initials are used instead);     - only the first word in the title of the journal article (except for proper nouns) is capitalized;     - different journals use different styles for Literature Cited sections.   You should pay careful attention to details of formatting when you write your own Literature Cited section. For papers published in journals you must provide the date, title, journal name, volume number, and page numbers. For books you need the publication date, title, publisher, and place of publication.

• Bates College Guide to Citing Sources
• American Psychological Association (APA) style A guide to formatting papers using APA from Purdue University.
• APA 2007 Revision of Citation Styles An online revision of the information presented in the fifth edition of the Publication Manual of the American Psychological Association . more... less... This guide serves a resource for citation styles and uniform means of referencing authoritative works.
• APA Documentation (University of Wisconsin-Madison) A quick resource for citing references in papers using the 5th edition of the Publication Manual of the American Psychological Association (2001). Provided by The Writing Center at the University of Wisconsin-Madison.
• American Anthropological Association Style Manual Prepared for and preferred by the American Anthropological Association (AAA) using the Chicago Manual of Style. Citation examples listed from pages 10-14. Also recommend consulting the Chicago Manual of Style Online.

• Elements of Style This classic work by William Strunk is intended for use in which the practice of composition is combined with the study of literature. It gives the main requirements of plain English style and concentrates on the rules of usage most often abused.
• IEEE Editorial Style Manual This link will take you to a downloadable version of the IEEE Editorial Style Manual.
• Modern Language Association (MLA) style
• Purdue OWL (Online Writing Lab) Easy-to-use site that provides information and examples for using the American Psychological Association (APA) citation and format style and the Modern Language Association (MLA) citation and format style. Also included information about the Chicago Manual of Style (16th ed.)
• Include citations that provide sufficient context to allow for critical analysis of this
• work by others.
• Include citations that give the reader sources of background and related material so
• that the current work can be understood by the target audience.
• Include citations that provide examples of alternate ideas, data, or conclusions to
• compare and contrast with this work, if they exist. Do not exclude contrary evidence.
• Include citations that acknowledge and give credit to sources relied upon for this
• Are the citations up to date, referencing that latest work on this topic?
• It is the job of the authors to verify the accuracy of the references.
• Avoid: spurious citations (citations that are not needed but are included anyway);

biased citations (references added or omitted for reasons other than meeting the above goals of citations); excessive self-cites (citations to one’s own work). 

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APA Style Guidelines

• About this Guide
• Blogs, Podcasts, and Social Media
• Content Marketing
• Popular Magazines
• Professional Organizations
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• Attributive Tags or Signal Phrases
• Citation Generators - Problems & Limitations
• Date Retrieved for Website Reference Entries & When to Use “n.d.” (no date)
• Differentiating between Sources with the Same Author and Date
• Hyperlinks & Attribution: "Citation" for Digital Documents
• Identifying & Citing Content Marketing
• Indirect Citations, or How to Cite a Quote or Paraphrase from a Source
• In-text Citations: Conveying Credibility
• In-text Citations: Using a Source Multiple Times
• In-text Citations: Principles & Formatting
• References Page: Principles & Formatting
• Synthesizing Multiple Sources
• URLs - When to Include to Entire Address
• Company Report
• General Website, Non-government Website

Government Publication or Website

• Industry Report from IBISWorld
• Informational Interview
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• O*Net Online
• Popular Business Magazine
• Professional/Trade Organization Website
• Reference Works (Dictionary, Investopedia, Wiki, etc.)
• Review Sites
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Cite government publications as a book, report, or website as appropriate. If there is no named author on the cover or title page, use the agency or department as the author. If the document is a report or publication, include the report number or other identifier after the title. If citing a website, include the entire URL.

General Rules: Citing Online Government Sources

In-text Citation: Information to Include

In-text citations and signal phrases can be woven into sentences and paragraphs in multiple ways, and what you emphasize depends on what information will be most relevant and/or persuasive to your reader. However, the following information should always be included:

• Attributive tag or signal phrase that introduces your source
• Author or government entity
• Page number, if applicable

Reference Citation: Information to Include

Government Entity. (Year, Month Day). Publication title in sentence case and italics . Parent Agency If Applicable. URL_but_not_active_hyperlink

Specific Example: Government Website

In-text Citation Options

Land conservationists can support wildlife refuges, particularly those for migratory birds, by purchasing a Federal Duck Stamp, which, according to the U.S. Fish & Wildlife Service (2021) also are “miniature works of art.”

Land conservationists can support wildlife refuges, particularly those for migratory birds, by purchasing a Federal Duck Stamp, which are also “miniature works of art” (U.S. Fish & Wildlife Service, 2021).

References Page Entry

U.S. Fish and Wildlife Service. (2021, June 28). Duck stamp: Put your stamp on conservation . U.S. Department of the Interior. https://www.fws.gov/birds/get-involved/duck-stamp.php

Note : This government web page has a “last updated” date, so you can use that.  For government websites with no date, use n.d. in place of the date and add a retrieval date.  See our page for General Website to see how this should look.

The Internal Revenue Service (2023) reported that the Inflation Reduction Act included clean energy tax credits for low-income communities.

The Inflation Reduction Act included clean energy tax credits for low-income communities (Internal Revenue Service, 2023).

Internal Revenue Service. (2023, September). Increased energy investment credit for solar and wind facilities benefitting low-income communities . U.S. Department of the Treasury. https://www.irs.gov/newsroom/increased-energy-investment-credit-for-solar-and-wind-facilities-benefitting-low-income-communities

Specific Example: PDF of a Government Report

In the 2016 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation, the U.S. Fish & Wildlife Service (2018) reported that Americans spent $75.9 billion dollars – 48 percent of all wildlife recreation expenditures – on wildlife watching (p. 39).

Wildlife watchers spent $12.1 billion dollars in 2016 purchasing equipment (e.g., cameras and bird feed) in pursuit of their hobby (U.S. Fish & Wildlife Service, 2018, p. 39).

U.S. Fish and Wildlife Service. (2018, April). 2016 national survey of fishing, hunting, and wildlife-associated recreation (Publication FHW/16-NAT). U.S. Department of the Interior. https://wsfrprograms.fws.gov/subpages/nationalsurvey/nat_survey2016.pdf

Specific Example: O*Net Entry

O*Net’s report on auditing mentioned that to stand out in this industry, auditors must have excellent communication skills (National Center for O*NET Development, 2019). 

To stand out, auditors must have excellent communication skills (National Center for O*NET Development, 2019).

 References Page Entry  

National Center for O*NET Development. (2019). Auditors (O*Net Report No. 13-2011.02). https://www.onetonline.org/link/summary/13-2011.02

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Computer Science > Computation and Language

Title: can llms generate novel research ideas a large-scale human study with 100+ nlp researchers.

Abstract: Recent advancements in large language models (LLMs) have sparked optimism about their potential to accelerate scientific discovery, with a growing number of works proposing research agents that autonomously generate and validate new ideas. Despite this, no evaluations have shown that LLM systems can take the very first step of producing novel, expert-level ideas, let alone perform the entire research process. We address this by establishing an experimental design that evaluates research idea generation while controlling for confounders and performs the first head-to-head comparison between expert NLP researchers and an LLM ideation agent. By recruiting over 100 NLP researchers to write novel ideas and blind reviews of both LLM and human ideas, we obtain the first statistically significant conclusion on current LLM capabilities for research ideation: we find LLM-generated ideas are judged as more novel (p < 0.05) than human expert ideas while being judged slightly weaker on feasibility. Studying our agent baselines closely, we identify open problems in building and evaluating research agents, including failures of LLM self-evaluation and their lack of diversity in generation. Finally, we acknowledge that human judgements of novelty can be difficult, even by experts, and propose an end-to-end study design which recruits researchers to execute these ideas into full projects, enabling us to study whether these novelty and feasibility judgements result in meaningful differences in research outcome.

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Data release associated with research that describes how major flooding and dam operations in the upper Mississippi River contribute to large upstream migrations of native paddlefish and invasive bigheaded carp

Recent research has attributed major flood events with the upstream spread of invasive carp in the Mississippi River. In two sequential years, the upper Mississippi River experienced a low water year with very minimal flooding in 2022 and a very high water year with extreme and sustained flooding in the spring of 2023. This data release contains hydrologic data from the U.S. Army Corps of Engineers at upper Mississippi River navigation locks 4-18 to classify when each dam experienced open river conditions and was no longer preventing upstream movements of fishes. To attribute biological movements around these open river conditions, we used acoustic telemetry data to track native paddlefish and invasive bigheaded carps. The telemetry data were used to identify instances where these fishes moved upstream through each of the dams. Telemetry data were also used to quantify distance traveled by each of the fish across our study years and define a distance over ground rate as kilometers per day. These data help explain some features of the upper Mississippi River that might inhibit upstream movements during low water years and how major floods increase connectivity in this river system that allows unimpeded upstream migration of invasive bigheaded carp. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Citation Information

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Andrea fritts, phd, dan gibson-reinemer, phd, fish biologist, douglas appel, amanda s milde, marybeth brey, phd, research fish biologist.

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Harvard President Claudine Gay to Submit 3 Additional Corrections, Corporation Says Improper Citations Fall Short of Research Misconduct

Updated: December 20, 2023, at 10:50 p.m.

Harvard President Claudine Gay will request three corrections to her 1997 Ph.D. dissertation in the latest series of updates Gay has submitted amid mounting allegations of plagiarism.

The new corrections were announced Wednesday evening in a summary of a review undertaken by the Harvard Corporation — the University’s highest governing body — into Gay’s academic work after they became aware of the plagiarism allegations.

The additional corrections come less than one week after the University announced that Gay submitted four corrections across two articles that were the subjects of the Corporation’s initial review.

The review — by both an independent panel of three experts and a subcommittee of the Harvard Corporation — found evidence that Gay did not cite properly in some instances but that her actions fell short of more serious wrongdoing, according to the summary.

Still, Gay’s decision to request corrections to her Ph.D. dissertation marks another serious setback for Harvard’s embattled leader as she reaches the end of a disastrous first semester in office.

In less than six months as president, Gay has faced fierce criticism over her response to the Israel-Hamas war , navigated an onslaught of plagiarism allegations , and watched the Corporation consider calls for her resignation .

The summary of the review paints the clearest picture to date of the Corporation’s decision-making behind requesting the corrections, outlining the timeline of when the body learned about the plagiarism allegations against Gay and explaining why it has not taken further action against her.

Harvard’s top brass were notified about plagiarism allegations against Gay through a media inquiry from the New York Post on Oct. 24, according to the summary.

Five days later, on Oct. 29, Gay asked the Corporation to independently investigate the allegations, and the board created a four-person subcommittee to “consider the merit of the anonymous allegations” brought forth by the Post.

According to the summary, the Corporation decided to undertake a review of the plagiarism allegations against Gay because the University’s research integrity offices ultimately report to the Office of the President, which could create “the potential for the appearance of a conflict of interest.”

On Nov. 2, the Corporation appointed an independent three-person expert panel to conduct the review. The members of the panel “have no ties to Harvard and are among the nation’s most respected political scientists,” according to the summary.

The panel analyzed the specific anonymous allegations raised by the New York Post’s media inquiry, with the Corporation’s subcommittee undertaking a more comprehensive review of “all of President Gay’s other published works from 1993 to 2019.”

The subcommittee, however, did not initially consider Gay’s Harvard dissertation as they had not received related allegations at the time and were focused on reviewing her published work, the summary stated.

The review, according to the summary, was performed under the Faculty of Arts and Sciences’ interim research misconduct policy — adopted in 2019 and still in place. Per the policy, a research misconduct finding requires evidence that the disputed action was taken “intentionally, knowingly, or recklessly” — which, per the summary, the Corporation’s review did not find.

Though a 1993 article Gay published in historical magazine Origins was initially examined by the review, the independent panel and the Corporation subcommittee decided the article was outside its scope because it was published 30 years ago in a journal that did not typically include citations or quotations, according to the summary.

The Crimson independently verified that articles in the May 1993 issue of Origins — published the same year as Gay’s article — did not include citations. The Crimson was unable to immediately review other issues of the magazine.

Following recent reports of alleged plagiarism in Gay’s dissertation , which the University wrote was not included in the Post’s initial comment request, the subcommittee also reviewed her dissertation.

The group found three instances of “inadequate citation” in Gay’s dissertation, one of which was nearly identical to “a missing citation or quotation mark that had already been identified in a published paper” — her 2001 article “The Effect of Black Congressional Representation on Political Participation” — which Gay has already corrected.

The University’s summary on Wednesday described the two additional instances found by the subcommittee as “duplicative language without appropriate attribution.”

According to the summary, Gay will submit three correction requests to Harvard’s Office of the Provost regarding her dissertation.

She will request to add “quotations and/or citations” that address language drawn from a paper presented by Bradley Palmquist and D. Stephen Voss at a 1996 conference and a 1981 American Political Science Review article by Richard D. Shingles.

Gay will also update citations in her dissertation to a 1990 paper by Lawrence Bobo and Franklin D. Gilliam — the same correction she requested for her 2001 article.

The summary also addressed an anonymous complaint submitted to the FAS’ Research Integrity Office, which was first reported by the Washington Free Beacon on Tuesday, that included previously unreported allegations of plagiarism.

According to the summary, the anonymous complaint included “four new allegations” that the Corporation subcommittee and the independent panel had not previously reviewed.

The subcommittee, however, determined the four new allegations “to be without merit.”

“The subcommittee of the Corporation has determined that no further action is required beyond the updates that have been and are being requested by President Gay,” the summary stated.

—Staff writer Tilly R. Robinson can be reached at [email protected] .

—Staff writer Neil H. Shah can be reached at [email protected] . Follow him on X @neilhshah15 or on Threads @kne.els .

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In Tied Presidential Race, Harris and Trump Have Contrasting Strengths, Weaknesses

2. issues and the 2024 election, table of contents.

• Other findings: An uncertain election outcome, the more critical candidate, Trump and the 2020 election
• Voting preferences among demographic groups
• Support for Harris, Trump among voters and nonvoters in recent elections
• How Harris and Trump supporters see their vote
• Do voters think it’s clear who will win?
• Most voters cite several issues as very important to their vote
• Changes in confidence in candidates on issues, following Biden’s departure from race 
• Do voters see the candidates as ‘too personally critical’?
• Do the candidates make you feel proud, hopeful, uneasy or angry?
• How the candidates make Harris and Trump supporters feel
• How men and women view the impact of the candidates’ genders
• Views of the candidates’ races and ethnicities
• Views of the candidates’ ages among younger and older voters
• Views of the values and goals of the other candidate’s supporters
• Should the president work with the opposing party in Congress?
• Top economic concerns: Food and consumer prices, housing costs
• Acknowledgments
• The American Trends Panel survey methodology

As concerns around the state of the economy and inflation continue, about eight-in-ten registered voters (81%) say the economy will be very important to their vote in the 2024 presidential election.

While the economy is the top issue among voters, a large majority (69%) cite at least five of the 10 issues asked about in the survey as very important to their vote.

There are wide differences between voters who support Harris and Trump when it comes to the issues.

Among Trump supporters, the economy (93%), immigration (82%) and violent crime (76%) are the leading issues. Just 18% of Trump supporters say racial and ethnic inequality is very important. And even fewer say climate change is very important (11%).

For Harris supporters, issues such as health care (76%) and Supreme Court appointments (73%) are of top importance. Large majorities also cite the economy (68%) and abortion (67%) as very important to their vote in the election.

Most voters cite several issues as very important to their vote this November. Very few – just 5% – say only one issue or no issues are highly important.

Majorities of both Harris supporters (71%) and Trump supporters (69%) say at least five of 10 issues included in the survey are very important to their vote.

Harris supporters are more likely than Trump supporters to say most of the issues included are very important. About a third of Harris supporters (32%) say at least eight of 10 issues are very important, compared with 17% of Trump supporters.

Top voting issues: 2020 versus 2024

While the economy has long been a top issue for voters – and continues to be one today – other issues have become increasingly important for voters over the past four years.

Immigration

About six-in-ten voters (61%) today say immigration is very important to their vote – a 9 percentage point increase from the 2020 presidential election and 13 points higher than during the 2022 congressional elections.

Immigration is now a much more important issue for Republican voters in particular: 82% of Trump supporters say it is very important to their vote in the 2024 election, up 21 points from 2020.

About four-in-ten Harris supporters (39%) say immigration is very important to their vote. This is 8 points higher than the share of Democratic congressional supporters who said this in 2022, but lower than the 46% of Biden supporters who cited immigration as very important four years ago.

In August 2020, fewer than half of voters (40%) said abortion was a very important issue to their vote. At the time, Trump voters (46%) were more likely than Biden voters (35%) to say it mattered a great deal.

Following the Supreme Court’s decision to overturn Roe v. Wade , opinions about abortion’s importance as a voting issue shifted. Today, 67% of Harris supporters call the issue very important – nearly double the share of Biden voters who said this four years ago, though somewhat lower than the share of midterm Democratic voters who said this in 2022 (74%). And about a third of Trump supporters (35%) now say abortion is very important to their vote – 11 points lower than in 2020.

Confidence in Harris and Trump on top issues

Voters have more confidence in Trump than Harris on economic, immigration and foreign policies. Half or more voters say they are at least somewhat confident in Trump to make good decisions in these areas, while smaller shares (45% each) say this about Harris.

In contrast, voters have more confidence in Harris than Trump to make good decisions about abortion policy and to effectively address issues around race. Just over half of voters have confidence in Harris on these issues, while 44% have confidence in Trump on these issues.

Trump holds a slight edge over Harris for handling law enforcement and criminal justice issues (51% Trump, 47% Harris). Voters are equally confident in Harris and Trump to select good nominees for the Supreme Court (50% each).

Fewer than half of voters say they are very or somewhat confident in either candidate to bring the country closer together (41% are confident in Harris, 36% in Trump). And voters express relatively little confidence in Trump (37%) or Harris (32%) to reduce the influence of money in politics.

Since Biden dropped out of the presidential race in July , there has been movement on how confident voters are in the candidates to address issues facing the country.

Abortion policy

In July, 48% of voters were confident in Biden to make good decisions about abortion policy. Today, 55% of voters are confident in Harris to do the same.

Harris currently has an 11-point advantage over Trump on voters’ confidence to handle abortion policy decisions.

Immigration policy

Voters also express more confidence in Harris to make wise decisions about immigration policy than they did for Biden before he withdrew from the race. Today, 45% are confident in Harris on this issue; in July, 35% said this about Biden.

While Trump’s advantage over Harris on immigration policy is less pronounced than it was over Biden, he continues to hold a 7-point edge. Voters are as confident in his ability to make wise decisions about immigration policy as they were in July (52%).

Foreign and economic policies

Harris has also improved over Biden in voters’ confidence to make good decisions about foreign and economic policies. Currently, 45% of voters are confident in Harris on each of these issues.

In July, 39% had confidence in Biden to make good foreign policy decisions, while a similar share (40%) had confidence in him on economic policy.

Trump holds an edge over Harris on both of these issues, though both are somewhat narrower than the advantage he had over Biden on these issues in July.

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