how to cite for a research paper mla

How To Cite a Research Paper: MLA, APA, and Chicago Style

• Posted on January 25, 2022

When you’re writing a research paper, you’ll use a variety of sources to find information. You might find that you end up using other people’s research papers as sources of information for your own work. You need to know how to cite a research paper properly.

Using text citations tells readers where you got your information, and help build a sense of trust, allowing the reader to feel confident that you haven’t falsified the information. You have to prove that you’ve done the research and found data to back up the claims you’re making.

Writing a paper without giving credit to people whose work you’re using is plagiarism. Unless you’re citing a direct quote you want to change the language enough, by putting the quote in your own words, so it sounds like original content. Quetext’s plagiarism checker  helps you search for similar content across the web so you can turn in a completely original paper.

Whether you’re submitting a research paper to school or for publication in a peer-reviewed journal, you’re required to cite your sources. Editors often reread the work of writers and researchers to ensure the information is factual. A teacher or professor will definitely check that your sources are accurate, so using tools like Quetext will help avoid unintentional plagiarism errors or wrongfully cited information.

Why Text Citations are Important

If you don’t have sources to back up your research, others might accuse you of spreading false information or plagiarism. Any journal publishing papers should verify what they’re printing, but ultimately, as the author, the buck stops with you.

In general, it’s a kindness to cite your sources. The people who created them did a lot of work, so it’s wrong to claim ownership of their ideas and information. But it’s also an ethical issue that can have major repercussions.

There have been cases where researchers  make up information  or falsify their sources and must face the consequences. People depend on factual information and don’t react well when they realize you lied to them or falsely paraphrase information.

That’s why it’s common knowledge to write a well-researched paper with text citations. If anyone claims your information is incorrect, you can point them to the source where you found the data. This doesn’t guarantee that the information you cited is correct, but you’ll be able to provide readers with a source of where you gathered your information.

When you’re citing other people’s research papers, make sure the source is legitimate. You should only use peer-reviewed journals so you know the article has gone through edits and fact-checking. Something identified as a research paper that is only on a blog or message board isn’t always a reliable source.

Many students like to use  Wikipedia  because there’s so much information available from one source. However, Wikipedia allows users to edit the information. What you read in a specific entry might not be true. It’s best to scroll down to the works cited and go to the original source yourself. If you can’t find a reliable, original source for the information, you shouldn’t use it.

Using the Various Citation Styles

The information used in any citation is basically the same across each style guide. The formatting and order of some elements may vary, so it’s important to know the difference between Modern Language Association (MLA), American Psychological Association (APA), and Chicago Styles.

The style you use depends on what type of writing you’re doing. All will use these basic elements in some form or another:

Source name

Volume and edition

Publication date

Page numbers

Publisher name

City and country of the publisher

URL and DOI for web pages and digital sources

The date you accessed the material

In addition to a reference list at the end of your work, you’ll also use in-text citations. Whenever you reference an idea or data that isn’t yours, you cite it. Each style has different types of in-text citations as well. Read on to find out about each citation format.

You’ll likely use the  MLA citation guide  if you’re writing papers in the humanities, such as for language arts, literary criticism, cultural studies, and more. The current edition of the MLA Handbook is the ninth because the style constantly evolves. As new technology creates new potential sources, MLA adds information to help students and researchers cite everything correctly.

The MLA Handbook has instructions on how to cite song lyrics, social media posts, and digital images, along with all of the standard research outlets. The book also gives detailed information on how to cite a research paper.

The MLA Handbook includes information about how to format your reference page. Use a 12-pt standard font like Times New Roman, so the text in italics is clearly different from the regular font. Center the title, Works Cited, at the top of the page. Your last name and page number are in the top right corner, and the reference page always comes at the end of your document.

Alphabetize citations according to the last name of the author. Left-align the citations and double-space them with no extra lines between each entry. When a citation goes beyond a single line, use a hanging indent to format it correctly. This lets the reader know it’s still the same citation continuing on.

Now that you know the basic format for the Works Cited page read on to find out how to cite a research paper for inclusion on this list.

Citing a Research Paper in MLA Style

When you’re citing a research paper in MLA style, you start with the author’s full name, putting the last name of the author first, followed by the title of the research paper in quotation marks. Next comes the the title of the journal that published the paper in italics, followed by the volume number, issue number, and date of publication.

You’ll also include the page number since the paper is in a journal with many pages. If you found the source online, include the digital object identifier or DOI. The DOI is a way to give a document a permanent web address so people reading your work can easily find the source.

MLA format also asks you to include the date you accessed online materials. Doing so gives your reader more information about when you read the research if it changed since that date. Here is an example of a research paper citation in MLA style:

Writer, Maria. “My Research Paper.” Research Journal, vol 3, no. 4, 2020, pp. 7-9. doi:12.34/mfs.12.34. Accessed 13 March 2021.

If the work wasn’t published online, you could stop your citation after the page numbers.

Sometimes you might find research papers that aren’t published in a scholarly journal. You can still use those in your work, but the MLA citation will look different. You’ll still put the last name of the author first, but instead of putting the title of the research paper in quotation marks, you’ll put it in italics.

Here is an example of an unpublished research paper citation in MLA style:

Writer, Maria. My Research Paper. 2020, http://websiteused.com . Accessed 13 March 2021.

These two examples show you how to document the source on your Works Cited page. In-text citations look different.

In-Text Citations for a Research Paper in MLA Style

When you’re working with the MLA format, an in-text reference requires a parenthetical citation.

If you refer to someone else’s research in a sentence, either with a direct quote or by paraphrasing, you need to give that author credit. At the end of the sentence where you use the information, you’ll put the author’s information in parenthesis and then put the sentence’s ending punctuation.

You use the author’s last name and the page number where you found the information for in-text citations. Then anyone reading your work can go to your Works Cited page, find the entry by the author’s last name, and access the document themselves. The page number directs them to where you got the specific information, so they don’t have to read the whole paper to find it. Here is an example of an in-text citation in MLA style:

Over 80% of the city’s garbage ended up in the ocean (Writer, 8).

You might mention the author’s name in your sentence. In that case, the parenthetical citation only needs to have the page numbers for reference. Here is an example:

According to Maria Writer, over 80% of the city’s garbage went into the ocean (8).

Researchers in the social science field, like sociology, anthropology, and psychology, use the  APA style  in their work. Like the MLA Handbook, the Publication Manual of the American Psychological Association has gone through changes over the years. It’s currently on the 7th edition.

In addition to helping you understand how to cite research, the Publication Manual of the American Psychological Association has information about how to format your paper to include tables, figures, and headings that often accompany scientific journal articles.

The Publication Manual of the American Psychological Association also tells you how to format your reference page. In MLA style, this is the Works Cited page. For APA style, it’s either the Reference List or Reference Page.

This page uses the same font style as the rest of the paper but starts on its own page with a number in the top right corner. The title of the page is bold and centered at the top and should simply read “References.”

List citations in alphabetical order by author’s last name regardless of the type of source. Each citation is double-spaced and has a hanging indent if it goes beyond one line.

Now that you understand how to properly format your APA reference page, learn how to cite a research paper to include on the list.

Citing a Research Paper in APA Style

When you use a research paper in your work, you need to include it on your APA references page at the end of your document.

An APA citation includes the same information as the MLA format but in a different order. The citation starts with the author’s last name but only uses their first initial. Then comes the year of publication in parenthesis.

The paper’s title follows, then the title of the journal in italics. You also include the journal volume, issue number, and page numbers. As with MLA citations, include a DOI if you found the research paper online. Here is an example of a published research paper cited in APA format:

Writer, M. (2020). My Research Paper. Research Journal, 3(4), 7-9. doi:12.34/mfs.12.34

If the paper isn’t published in a journal, you can still use it in your work with a proper citation. Here is an example:

Writer, M. (2020). My Research Paper [PDF]. Retrieved from http://websiteused.com

In-Text Citations for a Research Paper in APA Style

In-text citations in the APA format differ from MLA style. You still put it in parenthesis, but you include different information. For APA parentheticals, include the author’s last name and the paper’s year of publication. This method applies when you’re summarizing or paraphrasing the author’s idea. Here is an example of an in-text citation for a research paper in APA style:

Over 80% of the city’s garbage went into the ocean (Writer, 2020).

If you’re using a direct quote from the work you need to include the page number so the reader can find the quotation. Here is an example:

Maria Writer said, “Over 80% of the city’s garbage is going into the ocean” (2020, p. 8).

Chicago Style

Chicago Style  got its name from the University of Chicago, where the style originated. Writers use this format for works in the field of history, but you can also use it for the sciences, social sciences, and humanities.

MLA style has a Works Cited page, APA has References, and Chicago Style differs because it includes a Bibliography. The page comes at the end of your work with a page number in the top right corner. The title, “Bibliography,” is bold and centered at the top.

You will single-space your citations, but you’ll add an extra line between each entry. As with the other reference pages, you’ll left-align the work and use a hanging indent when a citation continues onto a second line.

Having an overview of how to format the bibliography will help you understand the citation styles for a research paper.

Citing a Research Paper in Chicago Style

Citations in Chicago Style are a mix of MLA and APA formats. It’s easiest to follow this template:

Writer, Maria. 2020. “My Research Paper.” Research Journal 3 (4): 7-9. doi:12.34/mfs.12.34.

As with other styles, you can reference an unpublished research paper as a document. Here is an example:

Writer, Maria. 2020. My Research Paper. PDF. http://websiteused.com .

In both instances, if there are multiple authors for a paper, list the rest of the authors in normal format. For example:

Author, Alan, Stanley Sample, and Maria Writer. 2020. “My Research Paper.” Research Journal 3 (4): 7-9. doi:12.34/mfs.12.34.

In-Text Citations for a Research Paper in Chicago Style

An in-text citation in Chicago Style is much simpler than both MLA and APA formats. You only need to include the last name of the author and year of publication in parenthesis with no comma in between them. For example:

Almost 80% of the city’s garbage goes into the ocean (Writer 2020).

You’ll include the page number for specificity if you’re quoting the author. Here’s an example:

Maria Writer said, “Over 80% of the city’s garbage is going into the ocean” (2020, 8).

You can also use endnotes in Chicago Style. A citation refers the reader to your source, but an endnote includes a bit of an explanation of why you used it. The information included in an endnote would disrupt the flow of your paper, but it’s still something you want the reader to know.

Make Text Citations Easy

Knowing when you need to cite a source helps you manage your research. Anytime you find information that you’re going to paraphrase, summarize, or quote in your work, you need to cite the source. The full citation will go on your reference page, but you’ll need an in-text citation where you use the information in your paper.

When you’re stating something that is  common knowledge , there’s no need to make a citation. Common knowledge is something that your reader would believe without needing proof. You can check if something is common knowledge by searching for it and finding it mentioned, without a citation, in at least five sources.

Once you learn the basics about citing a research paper in MLA, APA, and Chicago Styles, you’ll feel more confident in your work. The important thing is to pay attention to small details, like capitalization, italics and the use of abbreviations. But there’s no need to do it all on your own—Quetext has a  citation assistant  waiting to help. Give Quetext citation generator a try on your next project.

Sign Up for Quetext Today!

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Research Paper: MLA Citation

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• MLA Citation
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MLA Handbook

The MLA 9 Handbook is the official guide of MLA citation formatting. You can find the manual on reserve behind the circulation desk and in the reference section of the library's collection.

• EVC Library MLA Citation Guide

• MLA Handbook Plus This link opens in a new window MLA Handbook Plus is the online version of the Modern Language Association Handbook, the authoritative source for MLA citation formatting and research paper layout. Browse or search the book online, get citation examples for just about everything, see sample papers and lots more.

Click the image for an informative sample of a MLA research paper with explanations of formatting:  

Additional MLA Sample Papers

Formatting the Works Cited List

MLA requires specific formatting of your paper and Works Cited List.

Watch the video below for instructions on how to set up your paper in Microsoft word:

• MLA Template

This MS Word document template is pre-formatted according to proper MLA standards. Just insert your information and you are ready to go!

More Questions? MLA Resources

The Purdue OWL MLA Formattting and Style Guide is a helpful resource for MLA citation (giving credit for any quotes, facts, paraphrases, or summaries in your paper). Check here for help with your works cited page (bibliography page).

B ibMe   A guided citation builder -- entering your citation information and EasyBib will help you format your citation.

• MLA Handout from the EVC Library

MLA Citation Video

Learn MLA Citations by watching this video tutorial by EVC librarian, Heather Ott.

Works Cited Page

The last page of your essay is called the "Works Cited" list. This is where you list the full citation of the sources you used to write your paper.

To create the citations for your sources:

1. Use the MLA universal set of guidelines to build your citations. Here is the universal format to follow:

Author. "Title of Source". Title of Container , Other Contributors, Version, Number, Publisher, Publication date, Location.

EXAMPLE MAGAZINE ARTICLE:

Kunzig, Robert. "The New Europeans: Voices from a Changing Continent". National Geographic , vol. 258, no. 5, Nov. 2015, pp. 58-75.  

DETAILS ON EACH CATEGORY:

2. Your source may not contain information in all of these categories, so only include the information you have.  3. Pay attention to the punctuation. Put periods after the author, title of the source, and at the very end. Put commas in between everything else.

This is a basic overview of MLA Works Cited page. For more details and help with specific source formats, check out Purdue's Online Writing Lab MLA guide on:

Periodicals

Media and Audio/Visual sources

Electronic Sources

  MLA Format: In-Text Citation

In addition to creating the Works Cited list, you are also required to include in text citation.

This is a brief citation within your research paper that is placed after information which is quoted or paraphrased from the sources you use. In text citation for MLA generally requires two pieces of information:

1. Author's last name 2. The page number the information came from

The intext citation is often included at the end of a quote or paraphase and is formatted like this:

(Author's Last Name p#).

However, the placement of the intext can change depending on whether or not you introduce the author before your quote or paraphrasing, but the same information for the citation is still required. See examples below. Example 1 (paraphrased) : Eighty percent of children in the US eat grapes ​(Jenkins 3).

Example 2 (quoted) : Jenkins states, "In the United States, grapes are consumed by 80% of children" (3). More on MLA In-Text Citations at Purdue OWL .

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How do you cite a working paper in MLA style?

Note: This post relates to content in the eighth edition of the MLA Handbook . For up-to-date guidance, see the ninth edition of the MLA Handbook .

A working paper is a draft or an early version of a piece of writing, usually one that either has been or will be submitted for publication. Working papers submitted for publication can also be called prepublication or preprint versions, or by the term gray literature . You should either indicate that the source is a working paper in your prose or use the optional-element slot at the end of the entry to do so. The following sentence and works-cited-list entry provide an example of how to cite a working paper that is available in an online archive:

In a working paper published in  CORE , an open-access repository for humanities research, Erin Rose Glass and Micah Vandegrift argue that “[c]onnecting to the public is a key part of the mission of higher education.” Work Cited Glass, Erin Rose, and Micah Vandegrift. “Public Scholarship in Practice and Philosophy.”  CORE , 2018, dx.doi.org/10.17613/g64d-gd16. PDF download.

The following provides an example of how you would use the optional-element slot at the end of the entry to indicate that the source is a working paper (if, say, you did not mention it in your prose):  

Work Cited Conover, Kellam. “Rereading the Death of Turnus: Ritual, Time and Poetics in the Aeneid .” Princeton/Stanford Working Papers in Classics ,  www.princeton.edu/~pswpc/papers/authorAL/conover/conover.hml. Working paper.

U.S. Constitution.net

How to cite this site – the u.s. constitution online – usconstitution.net, how to cite this site.

Jump to: Citing the Constitution

It is very important when writing a paper for a school project (at any level, from elementary school to graduate school) to properly cite your sources. Where did you find your information? Citations are placed in the text as footnotes or endnotes, and/or placed at the end of your work in a bibliography. This page will handle a few different possibilities. The first is to answer the question “How do I cite a page on this site?” or, as I like to say, “How to cite the site.”

There are two main areas that someone might wish to cite on this site. The first is one of the pages found on the site. Several are simply electronic copies of historical documents, while others are research pages or opinion pages. You should be able to discern which is which pretty easily. Unless the information is a copy of a historical document, and unless otherwise noted, everything here is written by the Webmaster, Steve Mount.

Here is a standard way to cite an HTML page published on the Internet, according to the Columbia Guide to Online Style :

• Mount, Steve. “Constitutional Topic: Martial Law.” USConstitution.net. 30 Nov 2001. http://www.usconstitution.net/consttop_mlaw.html (3 Dec 2001)

Specifically, the data is as follows: Author, Title, Site, Modification Date (found at the bottom of every page), URL, and the date the page was accessed. The two dates are critical because of the changeable nature of the Web.

The next citation uses the APA format. This standard comes from the American Psychological Association, and is often used in psychology and other social sciences:

• Mount, S. (2010). Constitutional topic: due process. Retrieved February 23, 2011 from http://www.usconstitution.net/consttop_duep.html

Specifically, the data is as follows: Author, Modification Year (found at the bottom of every page), page title, the date the page was accessed, and the URL.

Finally, the MLA style is often used. This style comes from The Modern Language Association. With this style, citations are noted in the text and full references are given in a Works Cited list at the end of the paper.

• Inline: (Mount)
• Works Cited: Mount, Steve. “Constitutional Topic: The Census.” USConstitution.net . 3 Jan. 2011. 27 Feb. 2011 .

Specifically, the data is as follows: Author, Title, Site, Modification Date, thee date the page was accessed, and URL.

The second source of information is this site’s Message Boards. The primary information available in the Message Boards is opinion. Because the opinions are those of the posters, the citation of a message needs to include the name or handle of the poster. Here is an example, in the Columbia Style, for a posting from the Classic Boards on this site:

• Ian. “Re: Question regarding Law.” 2 Dec 2001. USConstitution.net Q&A Board. http://www.usconstitution.net/cgi-bin/wwwbmsg.cgi?const&001280.wwb (3 Dec 2001)

The data is as follows: Poster, Subject, Date Posted, Board Name, URL, and date accessed.

All posts created after November 2003 used the new messaging software. Here is an example for a posting using the new software:

• Andy. “Re: Impeach Scalia?” 5 Feb 2004. Debate Archives. http://www.usconstitution.net/yabb/YaBB.cgi?board=debarch;action=display;num=1077548457 (25 Feb 2004)

Citing the U.S. Constitution

Another common question involves how to cite the Constitution itself. There are two forms, a long form and a short form. In a legal document, the short form will suffice in all instances, whereas in a non-legal paper, the long form should be used once, and the short form can be used thereafter.

• “The Constitution of the United States,” Article 1, Section 8, Clause 5.
• “The Constitution of the United States,” Amendment 5.

Short Form:

• U.S. Const. art. I, § 8, cl. 5.
• U.S. Const. am. 5.

In place of the “§” symbol, the abbreviation “sect.” can be used. In a paper dealing primarily with the Constitution, there is no need to mention “U.S. Const.”

Home / Guides / Citation Guides / MLA Format / How to Cite an Essay in MLA

How to Cite an Essay in MLA

The guidelines for citing an essay in MLA format are similar to those for citing a chapter in a book. Include the author of the essay, the title of the essay, the name of the collection if the essay belongs to one, the editor of the collection or other contributors, the publication information, and the page number(s).

Citing an Essay

Mla essay citation structure.

Last, First M. “Essay Title.” Collection Title, edited by First M. Last, Publisher, year published, page numbers. Website Title , URL (if applicable).

MLA Essay Citation Example

Gupta, Sanjay. “Balancing and Checking.” Essays on Modern Democracy, edited by Bob Towsky, Brook Stone Publishers, 1996, pp. 36-48. Essay Database, www . databaseforessays.org/modern/modern-democracy.

MLA Essay In-text Citation Structure

(Last Name Page #)

MLA Essay In-text Citation Example

Click here to cite an essay via an EasyBib citation form.

MLA Formatting Guide

MLA Formatting

• Annotated Bibliography
• Bibliography
• Block Quotes
• et al Usage
• In-text Citations
• Paraphrasing
• Page Numbers
• Sample Paper
• Works Cited
• MLA 8 Updates
• MLA 9 Updates
• View MLA Guide

Citation Examples

• Book Chapter
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• View all MLA Examples

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To cite your sources in an essay in MLA style, you need to have basic information including the author’s name(s), chapter title, book title, editor(s), publication year, publisher, and page numbers. The templates for in-text citations and a works-cited-list entry for essay sources and some examples are given below:

In-text citation template and example:

For citations in prose, use the first name and surname of the author on the first occurrence. For subsequent citations, use only the surname(s). In parenthetical citations, always use only the surname of the author(s).

Citation in prose:

First mention: Annette Wheeler Cafarelli

Subsequent occurrences: Wheeler Cafarelli

Parenthetical:

….(Wheeler Cafarelli).

Works-cited-list entry template and example:

The title of the chapter is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name. “Title of the Chapter.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Cafarelli, Annette Wheeler. “Rousseau and British Romanticism: Women and British Romanticism.” Cultural Interactions in the Romantic Age: Critical Essays in Comparative Literature , edited by Gregory Maertz. State U of New York P, 1998, pp. 125–56.

To cite an essay in MLA style, you need to have basic information including the author(s), the essay title, the book title, editor(s), publication year, publisher, and page numbers. The templates for citations in prose, parenthetical citations, and works-cited-list entries for an essay by multiple authors, and some examples, are given below:

For citations in prose, use the first name and surname of the author (e.g., Mary Strine).

For sources with two authors, use both full author names in prose (e.g., Mary Strine and Beth Radick).

For sources with three or more authors, use the first name and surname of the first author followed by “and others” or “and colleagues” (e.g., Mary Strine and others). In subsequent citations, use only the surname of the first author followed by “and others” or “and colleagues” (e.g., Strine and others).

In parenthetical citations, use only the author’s surname. For sources with two authors, use two surnames (e.g., Strine and Radick). For sources with three or more author names, use the first author’s surname followed by “et al.”

First mention: Mary Strine…

Subsequent mention: Strine…

First mention: Mary Strine and Beth Radick…

Subsequent mention: Strine and Radick…

First mention: Mary Strine and colleagues …. or Mary Strine and others

Subsequent occurrences: Strine and colleagues …. or Strine and others

…. (Strine).

….(Strine and Radick).

….(Strine et al.).

The title of the essay is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name, et al. “Title of the Essay.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Strine, Mary M., et al. “Research in Interpretation and Performance Studies: Trends, Issues, Priorities.” Speech Communication: Essays to Commemorate the 75th Anniversary of the Speech Communication Association , edited by Gerald M. Phillips and Julia T. Wood, Southern Illinois UP, 1990, pp. 181–204.

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How do birds flock? Researchers do the math to reveal previously unknown aerodynamic phenomenon

Findings have potential applications for transportation and energy.

In looking up at the sky during these early weeks of spring, you may very well see a flock of birds moving in unison as they migrate north. But how do these creatures fly in such a coordinated and seemingly effortless fashion?

Part of the answer lies in precise, and previously unknown, aerodynamic interactions, reports a team of mathematicians in a newly published study. Its breakthrough broadens our understanding of wildlife, including fish, who move in schools, and could have applications in transportation and energy.

"This area of research is important since animals are known to take advantage of the flows, such as of air or water, left by other members of a group to save on the energy needed to move or to reduce drag or resistance," explains Leif Ristroph, an associate professor at New York University's Courant Institute of Mathematical Sciences and the senior author of the paper, which appears in the journal Nature Communications . "Our work may also have applications in transportation -- like efficient propulsion through air or water -- and energy, such as more effectively harvesting power from wind, water currents, or waves."

The team's results show that the impact of aerodynamics depends on the size of the flying group -- benefiting small groups and disrupting large ones.

"The aerodynamic interactions in small bird flocks help each member to hold a certain special position relative to their leading neighbor, but larger groups are disrupted by an effect that dislodges members from these positions and may cause collisions," notes Sophie Ramananarivo, an assistant professor at École Polytechnique Paris and one of the paper's authors.

Previously, Ristroph and his colleagues uncovered how birds move in groups -- but these findings were drawn from experiments mimicking the interactions of two birds. The new Nature Communications research expanded the inquiry to account for many flyers.

To replicate the columnar formations of birds, in which they line up one directly behind the other, the researchers created mechanized flappers that act like birds' wings. The wings were 3D-printed from plastic and driven by motors to flap in water, which replicated how air flows around bird wings during flight. This "mock flock" propelled through water and could freely arrange itself within a line or queue, as seen in a video of the experiment.

The flows affected group organization in different ways -- depending on the size of the group.

For small groups of up to about four flyers, the researchers discovered an effect by which each member gets help from the aerodynamic interactions in holding its position relative to its neighbors.

"If a flyer is displaced from its position, the vortices or swirls of flow left by the leading neighbor help to push the follower back into place and hold it there," explains Ristroph, director of NYU's Applied Mathematics Laboratory, where the experiments were conducted. "This means the flyers can assemble into an orderly queue of regular spacing automatically and with no extra effort, since the physics does all the work.

"For larger groups, however, these flow interactions cause later members to be jostled around and thrown out of position, typically causing a breakdown of the flock due to collisions among members. This means that the very long groups seen in some types of birds are not at all easy to form, and the later members likely have to constantly work to hold their positions and avoid crashing into their neighbors."

The authors then deployed mathematical modeling to better understand the underlying forces driving the experimental results.

Here, they concluded that flow-mediated interactions between neighbors are, in effect, spring-like forces that hold each member in place -- just as if the cars of a train were connected by springs.

However, these "springs" act in only one direction -- a lead bird can exert force on its follower, but not vice versa -- and this non-reciprocal interaction means that later members tend to resonate or oscillate wildly.

"The oscillations look like waves that jiggle the members forwards and backwards and which travel down the group and increase in intensity, causing later members to crash together," explains Joel Newbolt, who was an NYU graduate student in physics at the time of research.

The team named these new types of waves "flonons," which is based on the similar concept of phonons that refer to vibrational waves in systems of masses linked by springs and which are used to model the motions of atoms or molecules in crystals or other materials.

"Our findings therefore raise some interesting connections to material physics in which birds in an orderly flock are analogous to atoms in a regular crystal," Newbolt adds.

The study's other authors included the Courant Institute's Nickolas Lewis, Mathilde Bleu, Jiajie Wu, and Christiana Mavroyiakoumou.

The work was supported by grants from the National Science Foundation (DMS-1847955, DMS-1646339).

• New Species
• Bird Flu Research
• Environmental Issues
• Environmental Science
• Wildlife gardening
• Molecular biology
• May 2003 Tornado Outbreak Sequence
• Overfishing

Story Source:

Materials provided by New York University . Note: Content may be edited for style and length.

Related Multimedia :

• YouTube Video: Flocking Birds Experiment

Journal Reference :

• Joel W. Newbolt, Nickolas Lewis, Mathilde Bleu, Jiajie Wu, Christiana Mavroyiakoumou, Sophie Ramananarivo, Leif Ristroph. Flow interactions lead to self-organized flight formations disrupted by self-amplifying waves . Nature Communications , 2024; 15 (1) DOI: 10.1038/s41467-024-47525-9

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Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

MLA Tables, Figures, and Examples

Welcome to the Purdue OWL

This page is brought to you by the OWL at Purdue University. When printing this page, you must include the entire legal notice.

Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

The purpose of visual materials or other illustrations is to enhance the audience's understanding of information in the document and/or awareness of a topic. Writers can embed several types of visuals using most basic word processing software: diagrams, musical scores, photographs, or, for documents that will be read electronically, audio/video applications. Because MLA style is most often used in the humanities, it is unlikely that you will include raw scientific data in an MLA-style paper, but you may be asked to include other kinds of research in your writing. For additional information on writing a research paper in MLA style, visit the MLA Style Center’s page on Formatting a Research Paper .

General guidelines

• Collect sources. Gather the source information required for MLA documentation for the source medium of the illustration (e.g. print, Web, podcast).
• Determine what types of illustrations best suit your purpose. Consider the purpose of each illustration, how it contributes to the purpose of the document and the reader's understanding, and whether the audience will be able to view and/or understand the illustration easily.
• Use illustrations of the best quality. Avoid blurry, pixilated, or distorted images for both print and electronic documents. Often pixelation and distortion occurs when writers manipulate image sizes. Keep images in their original sizes or use photo editing software to modify them. Reproduce distorted graphs, tables, or diagrams with spreadsheet or publishing software, but be sure to include all source information. Always represent the original source information faithfully and avoid unethical practices of false representation or manipulation  (this is considered plagiarism) .
• Use illustrations sparingly. Decide what items can best improve the document's ability to augment readers' understanding of the information, appreciation for the subject, and/or illustration of the main points. Do not provide illustrations for illustrations' sake. Scrutinize illustrations for how potentially informative or persuasive they can be.
• Do not use illustrations to boost page length. In the case of student papers, instructors often do not count the space taken up by visual aids toward the required page length of the document. Remember that texts explain, while illustrations enhance. Illustrations cannot carry the entire weight of the document.

Labels, captions, and source information

Illustrations appear directly embedded in the document, except in the case of manuscripts that are being prepared for publication. (For preparing manuscripts with visual materials for publication, see Note on Manuscripts below.) Each illustration must include a label, a number, a caption and/or source information.

• The illustration label and number should always appear in two places:  the document main text (e.g. see fig. 1 ) and near the illustration itself ( Fig. 1 ).
• Captions  provide titles or explanatory notes (e.g., Van Gogh’s The Starry Night)
• Source information  documentation will always depend upon the medium of the source illustration. If you provide source information with all of your illustrations, you do not need to provide this information on the Works Cited page.

MLA documentation for tables, figures, and examples

MLA provides three designations for document illustrations: tables, figures, and examples (see specific sections below).

• Refer to the table and its corresponding numeral in-text. Do not capitalize the word table. This is typically done in parentheses (e.g. "(see table 2)").
• Situate the table near the text to which it relates.
• Align the table flush-left to the margin.
• Label the table 'Table' and provide its corresponding Arabic numeral. No punctuation is necessary after the label and number (see example below).
• On the next line, provide a caption for the table, most often the table title. Use title case.
• Place the table below the caption, flush-left, making sure to maintain basic MLA style formatting (e.g. one-inch margins).
• Below the title, signal the source information with the descriptor "Source," followed by a colon, then provide the correct MLA bibliographic information for the source in note form (see instructions and examples above). If you provide source information with your illustrations, you do not need to provide this information on the Works Cited page.
• If additional caption information or explanatory notes is necessary, use lowercase letters formatted in superscript in the caption information or table. Below the source information, indent, provide a corresponding lowercase letter (not in superscript), a space, and the note.
• Labels, captions, and notes are double-spaced.

Table Example

In-text reference:

In 1985, women aged 65 and older were 59% more likely than men of the same age to reside in a nursing home, and though 11,700 less women of that age group were enrolled in 1999, men over the same time period ranged from 30,000 to 39,000 persons while women accounted for 49,000 to 61,500 (see table 1).

Table reference:

Rate of Nursing Home Residence among People Age 65 or Older, by Sex and Age Group, 1985, 1995, 1997, 1999 a

Example Table

Source: Federal Interagency Forum on Aging-Related Statistics, Older Americans 2008: Key Indicators of Well-Being , Federal Interagency Forum on Aging-Related Statistics, Mar. 2008, table 35A.

a. Note: Rates for 65 and over category are age-adjusted using the 2000 standard population. Beginning in 1997, population figures are adjusted for net underenumeration using the 1990 National Population Adjustment Matrix from the U.S. Census Bureau. People residing in personal care or domiciliary care homes are excluded from the numerator.

• All visuals/illustrations that are not tables or musical score examples (e.g. maps, diagrams, charts, videos, podcasts, etc.) are labeled Figure or Fig.
• Refer to the figure in-text and provide an Arabic numeral that corresponds to the figure. Do not capitalize figure or fig .
• MLA does not specify alignment requirements for figures; thus, these images may be embedded as the reader sees fit. However, continue to follow basic MLA Style formatting (e.g. one-inch margins).
• Below the figure, provide a label name and its corresponding arabic numeral (no bold or italics), followed by a period (e.g. Fig. 1.). Here, Figure and Fig . are capitalized.
• Beginning with the same line as the label and number, provide a title and/or caption as well as relevant source information in note form (see instructions and examples above). If you provide source information with your illustrations, you do not need to provide this information on the Works Cited page.
• If full citation information is provided in the caption, use the same formatting as you would for your Works Cited page. However, names should be listed in  first name last name  format.

Figure Example

Some readers found Harry’s final battle with Voldemort a disappointment, and recently, the podcast, MuggleCast debated the subject (see fig. 2).

Figure caption (below an embedded podcast file for a document to be viewed electronically):

Fig. 2. Harry Potter and Voldemort final battle debate from Andrew Sims et al.; “Show 166”; MuggleCast ; MuggleNet.com, 19 Dec. 2008, www.mugglenet.com/2015/11/the-snape-debate-rowling-speaks-out.

Musical Illustrations/"Examples"

• The descriptor "Example" only refers to musical illustrations (e.g. portions of a musical score). It is often abbreviated "ex ." 
• Refer to the example in-text and provide an Arabic numeral that corresponds to the example. Do not capitalize "example" or "ex "  in the text.
• Supply the illustration, making sure to maintain basic MLA Style formatting (e.g. one-inch margins).
• Below the example, provide the label (capitalizing Example or Ex . ) and number and a caption or title. The caption or title will often take the form of source information along with an explanation, for example, of what part of the score is being illustrated. If you provide source information with your illustrations, you do not need to provide this information on the Works Cited page.

Musical Illustration Example

In Ambroise Thomas's opera Hamlet,  the title character's iconic theme first appears in Act 1. As Hamlet enters the castle's vacant grand hall following his mother's coronation, the low strings begin playing the theme (ex 1).

Musical Illustration reference:

Ex. 1: Hamlet's Theme

Source: Thomas, Ambroise. Hamlet . 1868.

Source information and note form

Notes serve two purposes: to provide bibliographic information and to provide additional context for information in the text. When it comes to citing illustrations, using notes allows for the bibliographic information as close to the illustration as possible.

Note form entries appear much like standard MLA bibliographic entries with a few exceptions:

• Author names are in First_Name—Last_Name format.
• Commas are substituted for periods (except in the case of the period that ends the entry).
• Publication information for books (publisher, year) appears in parentheses.
• Relevant page numbers follow the publication information.

Note: Use semicolons to denote entry sections when long series of commas make these sections difficult to ascertain as being like or separate (see examples below.) The MLA Handbook  (8 th ed.) states that if the table or illustration caption provides complete citation information about the source and the source is not cited in the text, authors do not need to list the source in the Works Cited list.

For additional information, visit the MLA Style Center’s page on Using Notes in MLA Style .

Examples - Documenting source information in "Note form"

The following examples provide information on how a note might look following an illustration. Write the word “Source” immediately before your source note. If an illustration requires more than one note, label additional notes with lowercase letters, starting with a (see the note underneath the example table above).

Tom Shachtman, Absolute Zero and the Conquest of Cold  (Houghton Mifflin, 1999), p. 35.

Website (using semicolons to group like information together)

United States; Dept. of Commerce; Census Bureau; Manufacturing, Mining, and Construction Statistics; Housing Units Authorized by Building Permits ; US Dept. of Commerce, 5 Feb. 2008; Table 1a.

In this example, the commas in Manufacturing, Mining, and Construction Statistics prompt the need for semicolons in order for the series information to be read easily. Even if Manufacturing, Mining, and Construction Statistics had not appeared in the entry, the multiple "author names" of United States, Dept. of Commerce, and Census Bureau would have necessitated the use of a semicolon before and after the title and between ensuing sections to the end of the entry.

Furthermore, the publisher and date in a standard entry are separated by a comma and belong together; thus, their inclusion here (US Dept. of Commerce, 5 Feb. 2008) also necessitates the semicolons.

Note on manuscripts

Do not embed illustrations (tables, figures, or examples) in manuscripts for publication. Put placeholders in the text to show where the illustrations will go. Type these placeholders on their own line, flush left, and bracketed (e.g. [table 1]). At the end of the document, provide label, number, caption, and source information in an organized list. Send files for illustrations in the appropriate format to your editor separately. If you provide source information with your illustrations, you do not need to provide this information on the Works Cited page.