biography is primary or secondary

Is a Biography a Primary Source? Details Every Author Should Know

Is a biography a primary source? Good question.

When writing for an audience, adding relevant quotes, excerpts, and data provides credibility to your work. Primary sources reign supreme because information that comes from the original source leaves little room for error. In our digital age, where so much information is repeated from website to website, it’s easy for data to be mistyped, quotes to be misattributed, and information to just be wrong.

It’s similar to the group game, Telephone, that kids play. One person starts the game by whispering a phrase into the person’s ear next to them. The phrase is repeated until it gets to the last person who says the phrase out loud to see if the message changed. When I played it as a little girl, the phrase hardly ever came out like the original. We run the same risk when we copy statistics or information from random websites that aren’t the primary or original source.

In the first half of this article, we’ll answer the question, “Is a biography a primary source?” define what the answer means, and then take a closer look at why biographies are categorized as such. In the second part, we’ll look at what to consider before writing one.

Table of Contents

Is a biography a primary source.

The short answer is no. In most cases, a biography is considered a secondary source; however, there’s a little more to it than that.

A primary source is a first-person account (e.g., direct quote, diary entry) or the original source of information (e.g., a research organization that creates original data for an industry.).

A secondary source is a third-party account where the person or company sharing the information, got it from somewhere else. As I mentioned in the Telephone example, the problem with secondary sources is that since they aren’t the first hands to touch the information, there’s no guarantee that it’s correct. Primary sources aren’t always available, but if you have a choice between the two, do the extra research to find the primary source. It will pay off in the long run.

A biography is a third-person account of another person’s life written by a biographer whose name appears on the cover. The subject of the biography can be living or deceased and the work can be authorized or unauthorized. For these reasons, biographies are classified as secondary sources. 

Related: Biography vs Memoir

The rare occasion when a biography can be used as a primary source is when the biographer is the subject of the content being written.

For example, if one were to write an article that analyzed the works of the American biographer Jean Strouse, her best biographies , Alice James: A Biography or Morgan: American Financier would be considered primary sources.

The source status of her biographies changes from secondary to primary because it is her writing that’s being analyzed not the personal knowledge of what she wrote (unless that was part of the review).

What’s the Difference Between an Authorized and an Unauthorized Biography? 

With an authorized biography, the subject of the work is either involved in the writing process or they’ve given permission for the biographer to write the book. The biographer works with the person to ensure that the information included is correct and approved. This can include talking to close family members and friends to get a more well-rounded, objective view of the person’s life.

Unauthorized biographies are not approved by the subject. Anyone can write an unauthorized biography about anyone they’d like. You don’t need permission, and the final book doesn’t have to be approved to be published; however, unauthorized biographies can be seen as less reliable than approved ones. Content presented as fact may come into question exposing the work to libel, invasion of privacy claims, and other legal issues. To be clear, biographies, autobiographies, and memoirs can all be vulnerable to legal claims, so tread lightly when writing them. 

According to the Writer’s GPS: A guide for navigating the legal landscape of publishing by intellectual property attorney Matt Knight, securing life story rights is key to protecting yourself and your book from legal claims. Regarding life story rights, he says the following:

Life story rights are a collection of legal rights held by an individual regarding a story about someone’s life. The purpose for securing these rights or the permission to use the facts of someone’s life is to protect the writer and publisher from being sued for defamation, invasion of privacy, or the misappropriation of the right to publicity. Life story rights agreements, depending on the breadth of the contract language, allows the writer to use and potentially change or dramatize the life story for entertainment purposes (whether in print or on screen). Knight, M. (2020). The Writer’s Legal GPS: A Guide for Navigating the Legal Landscape of Publishing (A Sidebar Saturdays Desktop Reference) . Sidebar Saturdays Desk Referen.

If you’re considering writing a biography (authorized or unauthorized), it’s important to understand potential liability issues and how they can impact you as the writer.

It’s interesting that for every authorized biography, it is not uncommon to find many unauthorized ones. For actress Elizabeth Taylor, the book on the left (below) was released in December 2022 and listed as “ the first ever authorized biography of the most famous movie star of the twentieth century, Elizabeth Taylor “; however, I found many biographies listed for her over the years (I stopped counting at 20).

Is it Possible to Write a Biography about Yourself? 

No. If you write a biography about yourself it is called an autobiography (different from a memoir). If you get a ghostwriter to write it, it is still an autobiography. Autobiographies are primary sources because they are first-hand accounts based on the subjects’ memories and recall of past experiences. 

Unlike a biography, the subject of the autobiography is viewed as the author , whether they wrote it or used a ghostwriter . Autobiographies are considered subjective compared to biographies since they are a single person’s account of events (not friends, family, or other third-party references like with a biography.)

How do You Write a Biography About Someone Who Has Passed?

As previously mentioned, if you can get permission to write the biography, do so. If the person is deceased, look for a representative, like a family member, or an executor of their estate. It’s important to share with them your plan for writing the person’s life story and hopefully get the green light to move forward. Getting approval can open the door to accessing archives and other personal details about the person to create a more in-depth work. This can include personal photos, diaries, and other information. Compare this to an unauthorized biography where you may only have access to what has already been talked about or uncovered. 

If the person passed a long time ago, getting permission might be a challenge, but you can still write the biography. Just do your research, save your notes, and try to write a biography that is thorough, objective, and professional. Prioritize primary sources over secondary and cite all of your sources to add credibility. It may be tempting to try to rush through the process, especially when you’ve been staring at the same information day after day, but doing a thorough job can pay big dividends.

In the writing of the Pulitzer Prize-winning biography American Prometheus: The Triumph and Trajedy of J. Robert Oppenheimer , it took author, Martin J. Sherwin, 25 years to complete the work. The first 20 years were spent doing interviews and collecting over fifty boxes of archives (some received through the Freedom of Information Act). The last five years he partnered with author Kai Bird to complete the work . While it doesn’t take every biographer that long to write a biography, it does add a weighty perspective to what writing an in-depth book about someone’s life could entail.

Whether you write an authorized or unauthorized biography, the quality and objectivity of your writing are what matter most. Although biographies are considered secondary sources, it doesn’t mean that they can’t make a significant contribution to the tapestry of a person’s public life record. 

Seek out the permission of the person you want to write about if they are living or their family or representative if they are incapacitated or deceased. People’s life stories are personal, so the best advice from one writer to another is to write their stories with the same respect you’d want someone to write yours. This will add a strong entry to your book portfolio, save you a lot of headaches in the long run, and help keep you out of a courtroom.

Note: In this article, we touched on nonfiction life stories, but there are also biographical novels (fictitious) and autobiographical fiction that are not within the scope of this article. For more information on creative nonfiction, start here . 

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Primary Sources

Texts of laws and other original documents.

Newspaper reports, by reporters who witnessed an event or who quote people who did.

Speeches, diaries, letters and interviews - what the people involved said or wrote.

Original research.

Datasets, survey data, such as census or economic statistics.

Photographs, video, or audio that capture an event.

Secondary Sources

Secondary Sources are one step removed from primary sources, though they often quote or otherwise use primary sources. They can cover the same topic, but add a layer of interpretation and analysis. Secondary sources can include:

Most books about a topic.

Analysis or interpretation of data.

Scholarly or other articles about a topic, especially by people not directly involved.

Documentaries (though they often include photos or video portions that can be considered primary sources).

When is a Primary Source a Secondary Source?

Whether something is a primary or secondary source often depends upon the topic and its use.

A biology textbook would be considered a secondary source if in the field of biology, since it describes and interprets the science but makes no original contribution to it.

On the other hand, if the topic is science education and the history of textbooks, textbooks could be used a primary sources to look at how they have changed over time.

Examples of Primary and Secondary Sources

Adapted from Bowling Green State University, Library User Education, Primary vs. Secondary Sources .

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• Primary vs. Secondary Sources | Difference & Examples

Primary vs. Secondary Sources | Difference & Examples

Published on 4 September 2022 by Raimo Streefkerk . Revised on 15 May 2023.

When you do research, you have to gather information and evidence from a variety of sources.

Primary sources provide raw information and first-hand evidence. Examples include interview transcripts, statistical data, and works of art. A primary source gives you direct access to the subject of your research.

Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books . A secondary source describes, interprets, or synthesises primary sources.

Primary sources are more credible as evidence, but good research uses both primary and secondary sources.

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Table of contents

What is a primary source, what is a secondary source, primary and secondary source examples, how to tell if a source is primary or secondary, primary vs secondary sources: which is better, frequently asked questions about primary and secondary sources.

A primary source is anything that gives you direct evidence about the people, events, or phenomena that you are researching. Primary sources will usually be the main objects of your analysis.

If you are researching the past, you cannot directly access it yourself, so you need primary sources that were produced at the time by participants or witnesses (e.g. letters, photographs, newspapers ).

If you are researching something current, your primary sources can either be qualitative or quantitative data that you collect yourself (e.g. through interviews, surveys, experiments) or sources produced by people directly involved in the topic (e.g. official documents or media texts).

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A secondary source is anything that describes, interprets, evaluates, or analyses information from primary sources. Common examples include:

• Books , articles and documentaries that synthesise information on a topic
• Synopses and descriptions of artistic works
• Encyclopaedias and textbooks that summarize information and ideas
• Reviews and essays that evaluate or interpret something

When you cite a secondary source, it’s usually not to analyse it directly. Instead, you’ll probably test its arguments against new evidence or use its ideas to help formulate your own.

Examples of sources that can be primary or secondary

A secondary source can become a primary source depending on your research question . If the person, context, or technique that produced the source is the main focus of your research, it becomes a primary source.

To determine if something can be used as a primary or secondary source in your research, there are some simple questions you can ask yourself:

• Does this source come from someone directly involved in the events I’m studying (primary) or from another researcher (secondary)?
• Am I interested in analysing the source itself (primary) or only using it for background information (secondary)?
• Does the source provide original information (primary) or does it comment upon information from other sources (secondary)?

Most research uses both primary and secondary sources. They complement each other to help you build a convincing argument. Primary sources are more credible as evidence, but secondary sources show how your work relates to existing research.

What do you use primary sources for?

Primary sources are the foundation of original research. They allow you to:

• Make new discoveries
• Provide credible evidence for your arguments
• Give authoritative information about your topic

If you don’t use any primary sources, your research may be considered unoriginal or unreliable.

What do you use secondary sources for?

Secondary sources are good for gaining a full overview of your topic and understanding how other researchers have approached it. They often synthesise a large number of primary sources that would be difficult and time-consuming to gather by yourself. They allow you to:

• Gain background information on the topic
• Support or contrast your arguments with other researchers’ ideas
• Gather information from primary sources that you can’t access directly (e.g. private letters or physical documents located elsewhere)

When you conduct a literature review , you can consult secondary sources to gain a thorough overview of your topic. If you want to mention a paper or study that you find cited in a secondary source, seek out the original source and cite it directly.

Remember that all primary and secondary sources must be cited to avoid plagiarism . You can use Scribbr’s free citation generator to do so!

Common examples of primary sources include interview transcripts , photographs, novels, paintings, films, historical documents, and official statistics.

Anything you directly analyze or use as first-hand evidence can be a primary source, including qualitative or quantitative data that you collected yourself.

Common examples of secondary sources include academic books, journal articles , reviews, essays , and textbooks.

Anything that summarizes, evaluates or interprets primary sources can be a secondary source. If a source gives you an overview of background information or presents another researcher’s ideas on your topic, it is probably a secondary source.

To determine if a source is primary or secondary, ask yourself:

• Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
• Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
• Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of sources are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews ). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism .

A fictional movie is usually a primary source. A documentary can be either primary or secondary depending on the context.

If you are directly analysing some aspect of the movie itself – for example, the cinematography, narrative techniques, or social context – the movie is a primary source.

If you use the movie for background information or analysis about your topic – for example, to learn about a historical event or a scientific discovery – the movie is a secondary source.

Whether it’s primary or secondary, always properly cite the movie in the citation style you are using. Learn how to create an MLA movie citation or an APA movie citation .

Articles in newspapers and magazines can be primary or secondary depending on the focus of your research.

In historical studies, old articles are used as primary sources that give direct evidence about the time period. In social and communication studies, articles are used as primary sources to analyse language and social relations (for example, by conducting content analysis or discourse analysis ).

If you are not analysing the article itself, but only using it for background information or facts about your topic, then the article is a secondary source.

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 Reference Generator.

Streefkerk, R. (2023, May 15). Primary vs. Secondary Sources | Difference & Examples. Scribbr. Retrieved 2 September 2024, from https://www.scribbr.co.uk/working-sources/primary-vs-secondary-sources/

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Primary Sources

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What are Primary and Secondary Sources?

Primary Sources Primary sources are the "materials on a topic upon which subsequent interpretations or studies are based, anything from firsthand documents such as poems, diaries, court records, and interviews to research results generated by experiments, surveys, ethnographies, and so on."*

Primary sources are records of events as they are first described, usually by witnesses or people who were involved in the event. Many primary sources were created at the time of the event but can also include memoirs, oral interviews, or accounts that were recorded later.  

Visual materials, such as photos, original artwork, posters, and films are important primary sources, not only for the factual information they contain, but also for the insight they may provide into how people view their world.   Primary sources may also include sets of data, such as census statistics, which have been tabulated but not interpreted. However, in the sciences or social sciences, primary sources report the results of an experiment. 

It can sometimes be difficult to determine whether a particular source is primary or secondary, because the same source can be a primary source for one topic and a secondary source for another topic.   David McCullough’s biography, John Adams , could be a secondary source for a paper about John Adams but a primary source for a paper about how various historians have interpreted the life of John Adams.

*From Hairston, Maxine and John J. Ruszkiewicz. The Scott, Foresman Handbook for Writers. 4th ed. New York: HarperCollins College Publishers, 1996, pg. 547.

Secondary Sources Secondary sources offer an analysis or a restatement of primary sources. They often attempt to describe or explain primary sources. Some secondary sources not only analyze primary sources, but also use them to argue a contention or persuade the reader to hold a certain opinion. Examples of secondary sources include dictionaries, encyclopedias, textbooks, and books and articles that interpret, analyze, or review research works.

More Examples of Primary and Secondary Sources

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Looking for a book, article, database or something else for your research, primary sources.

A  primary source  is an  original  document containing  firsthand  information about a topic.

Different fields of study may use different types of primary sources. Common examples of a primary source are:

• Autobiographies
• Eyewitness Accounts
• Interview Transcripts
• Legal Documents
• Original works of art
• Photographs of the topic
• Original Research
• Video Footage of the topic event
• Works of literature

Secondary Sources

A  secondary source  contains commentary on or discussion about a primary source. The most important feature of secondary sources is that they offer an  interpretation  of information gathered from primary sources.

Common examples of a secondary source are:

• Biographies
• Indexes, Abstracts, Bibliographies (used to locate a secondary source)
• Journal Articles
• Literary Criticism
• Monographs written about the topic
• Reviews of books, movies, musical recordings,. works of art, etc.

Primary vs. Secondary Information

Primary sources are first hand sources; secondary sources are second-hand sources. For example, suppose there had been a car accident. The description of the accident which a witness gives to the police is a primary source because it comes from someone who was actually there at the time. The next day's newspaper story is a secondary source because the reporter who wrote the story did not actually witness the event.  The reporter is presenting a way of understanding the accident or an interpretation.

*From North Park University, History Department

However , the distinctions between primary and secondary sources can be ambiguous. It is important to remember that you cannot determine whether a source is primary or secondary solely based on the document type. An individual document may be a primary source in one context and a secondary source in another. For example, the movie  Love, Marilyn  is a secondary source when the topic is Marilyn Monroe; it would be considered a primary source if the topic of research was the works of Liz Garbus (the film's director).

Additionally, time can be a defining element. For example, a recent newspaper article is not usually a primary source; but a newspaper article from the 1860’s may be a primary source for United States Civil War research.

*From CBB Library and IT Consortium

Examples of Primary and Secondary Sources

Sometimes, the same source might be a primary source for one research paper and a secondary source for another. It all depends on the relationship of the source to your research question. For example, if you are researching Franklin Roosevelt's life, the book  No ordinary time: Franklin and Eleanor Roosevelt: The home front in World War II  by Doris Kearns Goodwin would be a secondary source. If you were researching the literary style of Ms. Goodwin, it would be a primary source.

*From Joyner Library, East Carolina University

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Primary Sources

What are Primary Sources?

There are many types of primary sources. Definitions vary by academic discipline.

Common elements to all types of primary sources are

Primary source materials have not been edited, evaluated, analyzed, combined, commented on, or changed by a person other than the creator.

Is a book a primary source?

The format, such as a book, newspaper, or film, does not determine whether the item is a primary source. Content and context are the determining factors.

What about translations?

Official or authorized translations are generally considered primary.  Unofficial translations are usually not considered primary because the translator may have biases or may not be fully fluent in the subject matter.  Translations generated by software, such as Google Translate, are never, ever, considered primary sources.

What are the types of Primary Sources?

“I was there” – Personal Accounts

Among the most frequently used primary sources are writings or interviews that come directly from the people who were present when the event being studied occurred. This material, created by individuals who directly experienced or were involved in the subject under investigation, is considered primary. The “I was there” type of primary source is referred in many different terms:

• Personal recollection
• Firsthand account
• Eyewitness report
• Contemporary account
• Direct Personal recollection
• Personal observation
• Autobiography
• Saw with ‘own eyes’

In additional to personal accounts, documents, such as court records, laws, hearings, treaties, death certificates, maps, photographs, that originate from or were created at the time of the event being studied are also primary sources. In some cases, documents created shortly after the event can also be primary.

Original Creations

Original creations by a person, such as letters, diaries, an autobiography, poem, musical score, work of art, screenplays, military field notes, a scientist’s lab notebooks, or an anthropologist’s diaries are primary.

Numerical data is a primary source. Data from public opinion polls may be primary. Once the raw data is interpreted or combined with other data it may no longer be primary.

Tools, clothing, buildings, films, TV shows, or tangible objects from a particular period can be a primary source.

Why are primary sources needed in research?

Original materials provide valuable insights into the culture, perspectives, actions, and conditions, making them essential for analysis and understanding of a particular time period, event or subject.

What are some examples of primary sources?

• Autobiographies
• Scientists' lab notebooks
• Photographs
• Official records (government reports, transcripts, court records, death certificates, etc.)
• Contemporary news reports (newspapers, telecasts, radio addresses, etc.)
• Eye-witness accounts
• Military Field Notes
• Ships' logs
• Music (scores, sheet music, recordings, etc.)
• Images (photographs, paintings, films etc.)
• Polls & Public Opinion Data
• Laws, statutes, hearings

What is a Secondary Source?

A secondary source interprets and analyzes primary sources. These sources are one or more steps removed from the event. Secondary sources may include images of or quotes from primary sources. Some types of secondary sources include: journal/magazine articles, textbooks, commentaries, and encyclopedias.

In the strictest sense, translations are secondary sources unless the translation is provided by the author or issuing agency.  Consult your professor if you have questions about a source.

Secondary sources are interpretations and analyses based on primary sources.

For example, an autobiography is a primary source while a biography is a secondary source.

Typical secondary sources include:

• Scholarly Journal Articles.  Use these and books exclusively for writing Literature Reviews.
• Encyclopedias.
• Dictionaries.
• Documentaries. (but can also be primary)
• Newspapers.

Please note that a book is simply a format.  You can find primary and secondary sources published in book form.

Subject Guide

Can a Secondary Source become a Primary Source? What about newspapers?

Often secondary and primary sources are relative concepts.  Typical secondary sources may be primary sources depending on the research topic.

• Newspapers may be either primary or secondary. Most articles in newspapers are secondary, but reporters may be considered as witnesses to an event.  Any topic on the media coverage of an event or phenomenon would treat newspapers as a primary source.  There are so many articles and types of articles in newspapers that they can often be considered both primary and secondary.
• Intellectual history topics. For example, although scholarly journal articles are usually considered secondary sources, if one's topic is the history of human rights, then journal articles on human rights will be primary sources in this instance.  Similarly, research on the thinking of a scholar will include her published journal articles as primary sources.
• Historical topics. Magazine articles are secondary sources, but for someone researching the view of judicial punishment in the 1920s, magazines from that time period are primary sources.  Indeed, any older publication, such as those prior to the 20th century, is very often automatically considered a primary source.
• Translations In the strictest sense, translations are secondary sources unless the translation is provided by the author or issuing agency.  Consult your professor if you have questions about a source.

-Clement Ho

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Distinguish between primary and secondary sources.

• Further Information

Introduction

1. Introduction

Whether conducting research in the social sciences, humanities (especially history), arts, or natural sciences, the ability to distinguish between primary and secondary source material is essential. Basically, this distinction illustrates the degree to which the author of a piece is removed from the actual event being described, informing the reader as to whether the author is reporting impressions first hand (or is first to record these immediately following an event), or conveying the experiences and opinions of others—that is, second hand .  

2. Primary sources

These are contemporary accounts of an event, written by someone who experienced or witnessed the event in question. These original documents (i.e., they are not about another document or account) are often diaries, letters, memoirs, journals, speeches, manuscripts, interviews and other such unpublished works. They may also include published pieces such as newspaper or magazine articles (as long as they are written soon after the fact and not as historical accounts), photographs, audio or video recordings, research reports in the natural or social sciences, or original literary or theatrical works.  

3. Secondary sources

The function of these is to interpret primary sources , and so can be described as at least one step removed from the event or phenomenon under review. Secondary source materials, then, interpret, assign value to, conjecture upon, and draw conclusions about the events reported in primary sources. These are usually in the form of published works such as journal articles or books, but may include radio or television documentaries, or conference proceedings.  

4. Defining questions

When evaluating primary or secondary sources, the following questions might be asked to help ascertain the nature and value of material being considered:

• How does the author know these details (names, dates, times)? Was the author present at the event or soon on the scene?
• Where does this information come from—personal experience, eyewitness accounts, or reports written by others?
• Are the author's conclusions based on a single piece of evidence, or have many sources been taken into account (e.g., diary entries, along with third-party eyewitness accounts, impressions of contemporaries, newspaper accounts)?

Ultimately, all source materials of whatever type must be assessed critically and even the most scrupulous and thorough work is viewed through the eyes of the writer/interpreter. This must be taken into account when one is attempting to arrive at the 'truth' of an event.

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The land acknowledgement used at UC Santa Cruz was developed in partnership with the Amah Mutsun Tribal Band Chairman and the Amah Mutsun Relearning Program at the UCSC Arboretum .

Primary, Secondary & Tertiary Sources

What they are and how they compare (with examples)

By: Derek Jansen (MBA) | Expert Reviewed By: Kerryn Warren (PhD) | January 2023

If you’re new to the wild world of research, you’re bound to encounter the terrible twins, “ primary source ” and “ secondary source ” sooner or later. With any luck, “ tertiary sources ” will get thrown into the mix too! In this post, we’ll unpack both what this terminology means and how to apply it to your research project.

Overview: Source Types

• Primary sources
• Examples of primary sources
• Pros and cons of primary data
• Secondary sources
• Examples of secondary sources
• Pros and cons of secondary data
• Tertiary sources
• Summary & recap

What are primary sources?

Simply put, primary sources (also referred to as primary data) are the original raw materials, evidence or data collected in a study. Primary sources can include interview transcripts , quantitative survey data, as well as other media that provide firsthand accounts of events or phenomena. Primary sources are often considered to be the purest sources because they provide direct, unfiltered data which has not been processed or interpreted in any way.

In addition to the above, examples of primary sources can include

• Results from a social media poll
• Letters written by a historical figure
• Photographs taken during a specific time period
• Government documents such as birth certificates and census records
• Artefacts like clothing and tools from past cultures

Naturally, working with primary data has both benefits and drawbacks. Some of the main advantages include

• Purity : primary sources provide firsthand accounts of events, ideas, and experiences, which means you get access to the rawest, purest form of data.
• Perspective : primary sources allow you to gain a deeper understanding of the perspectives of the people who created them, providing insights into how different groups of people viewed an event or phenomenon.
• Richness : primary data often provide a wealth of detail and nuance that can be missed in secondary data (we’ll cover that shortly). This can provide you with a more complete and nuanced understanding of their topic.

On the flip side, some of the main disadvantages include

• Bias : given their “rawness”, primary sources can often contain biases that can skew or limit your understanding of the issue at hand.
• Inaccessibility : sometimes, collecting fresh primary data can be difficult or even impossible. For example, photographs held in private collections or letters written in a language that you’re not fluent in.
• Fragility : physical artefacts such as manuscripts may be fragile and require special handling, which can make them difficult for you to access or study.
• Limited scope : primary sources often only provide a glimpse of a particular event, person, or period of time, so you may need to rely on multiple primary sources to gain a more complete understanding of a topic.

As you can see, the strengths and weaknesses of primary sources are oftentimes two sides of the same coin . For example, primary data allow you to gain insight into peoples’ unique perspectives, but at the same time, it bakes in a significant level of each participant’s personal bias. So, it’s important to carefully consider what your research aim is and whether it lends itself to this type of data source.

Now that you’ve got a clearer picture of what primary sources/data are, let’s take a look at secondary sources.

What are secondary sources?

Secondary sources are materials that provide an analysis or interpretation of primary sources (primary data). For example, secondary sources of information can include books, journal articles and documentaries . Unlike primary sources (which are raw and uninterpreted), secondary sources provide a distilled, interpreted view of the data.

Other examples of secondary sources include

• A book that provides an analysis of an event
• A biography of a pop icon
• An article that provides an interpretation of a public opinion poll
• A blog post that reviews and compares the performance of competing products

As with primary sources, secondary sources have their own set of pros and cons. Some of the main advantages include:

• Convenience: secondary sources are often easier to access and use than primary sources, as they are widely available in libraries, journal databases, etc.
• Interpretation and synthesis : secondary sources provide a synthesis of the topic of interest, which can help you to quickly understand the most important takeaways from a data set.
• Time-saving : secondary sources can save you time, as you don’t need to analyse primary sources yourself – you can just read summaries or interpretations provided by experts in the field.

At the same time, it’s important to be aware of the disadvantages of secondary sources. Some of the main ones to consider are

• Distance from original sources : secondary sources are based on primary data, but the information has been filtered through the lens of the author, which will naturally carry some level of bias and perhaps even a hidden agenda.
• Limited context: secondary sources may not provide the same level of contextual information or detail as primary sources, which can limit your understanding of the situation and contribute toward a warped understanding.
• Inaccuracies : since secondary sources are the product of human efforts, they may contain inaccuracies or errors, especially if the author has misinterpreted primary data.
• Outdated information : secondary sources may be based on primary sources that are no longer valid or accurate, or they may not take into account more recent research or discoveries.

It’s important to mention that primary and secondary data are not mutually exclusive . In other words, it doesn’t always need to be one or the other. Secondary sources can be used to supplement primary data by providing additional information or context for a particular topic.

For example, if you were researching Martin Luther King Jr., your primary source could be transcripts of the speeches he gave during the civil rights movement. To supplement this information, you could then use secondary sources such as biographies written about him or newspaper articles from the time period in which he was active.

So, once again, it’s important to think about what you’re trying to achieve with your research – that is to say, what are your research aims? As with all methodological choices, your decision to make use of primary or secondary data (or both), needs to be informed by your overall research aims .

Before we wrap up though, it’s important to look at one more source type – tertiary sources.

Need a helping hand?

What are tertiary sources?

Last but not least, we’ve got tertiary sources . Simply put, tertiary sources are materials that provide a general overview of a topic . They often summarise or synthesise information from a combination of primary and secondary sources, such as books, articles, and other documents.

Some examples of tertiary sources include

• Encyclopedias
• Study guides
• Dictionaries

Tertiary sources can be useful when you’re just starting to learn about a completely new topic , as they provide an overview of the subject matter without getting too in-depth into specific details. For example, if you’re researching the history of World War II, but don’t know much about it yet, reading an encyclopedia article (or Wikipedia article) on the war would be helpful in providing you with some basic facts and background information.

Tertiary sources are also useful in terms of providing a starting point for citations to primary and secondary source material which can help guide your search for more detailed, credible information on a particular topic. Additionally, these types of resources may also contain lists of related topics or keywords which you can use to find more information regarding your topic of interest.

Importantly, while tertiary sources are a valuable starting point for your research, they’re not ideal sources to cite in your dissertation, thesis or research project. Instead, you should aim to cite high-quality, credible secondary sources such as peer-reviewed journal articles and research papers . So, remember to only use tertiary sources as a starting point. Don’t make the classic mistake of citing Wikipedia as your main source!

Let’s recap

In this post, we’ve explored the trinity of sources: primary, secondary and tertiary.

• Primary sources include the original raw evidence or data that you collect yourself in a study. For example, interview transcripts or statistical data.
• Secondary sources include distilled analyses and interpretations of primary data that someone else collected in their study. For example, journal articles and critical analysis pieces.
• Tertiary sources include materials that provide a general overview of a topic. For example, encyclopedias, study guides and handbooks.
• Each source type has its own set of strengths and weaknesses , and can play a different role within a research project.
• Primary sources and secondary sources are not necessarily mutually exclusive – they can work together to provide a comprehensive view.
• It’s important to ensure that your choice of source (or sources) is guided by and aligned with your research aims .

If you’d like to learn more about primary and secondary research, be sure to check out the rest of the Grad Coach blog here . Alternatively, if you’re looking for hands-on help with your project, take a look at our 1-on-1 private coaching service .

Psst... there’s more!

This post was based on one of our popular Research Bootcamps . If you're working on a research project, you'll definitely want to check this out ...

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What is a primary source?

Primary sources provide the raw data you use to support your arguments. Some common types of primary resources include manuscripts, diaries, court cases, maps, data sets, experiment results, news stories, polls, or original research.  In many cases what makes a primary resource is contextual.  For example, a biography about Abraham Lincoln is a secondary resource about Lincoln. However, if examined as a piece of evidence about the nature of biographical writing, or as an example of the biographer's writing method it becomes a primary resource.

What is a secondary source?

Secondary sources analyze primary sources, using primary source materials to answer research questions.  Secondary sources may analyze, criticize, interpret or summarize data from primary sources. The most common secondary resources are books, journal articles, or reviews of the literature. Secondary sources may also be primary sources. For example if someone studies the nature of literary criticism in the 19th century then a literary critique from the 19th century becomes a primary resource.

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Primary, Secondary, and Tertiary Sources

Search catalog, what are the differences.

Sources of information or evidence are often categorized as primary, secondary, or tertiary material. These classifications are based on the originality of the material and the proximity of the source or origin. This informs the reader as to whether the author is reporting information that is first hand or is conveying the experiences and opinions of others which is considered second hand. Determining if a source is primary, secondary or tertiary can be tricky. Below you will find a description of the three categories of information and examples to help you make a determination.

Primary Sources

These sources are records of events or evidence as they are first described or actually happened without any interpretation or commentary. It is information that is shown for the first time or original materials on which other research is based.  Primary sources display original thinking, report on new discoveries, or share fresh information.

Secondary Sources

These sources offer an analysis or restatement of primary sources. They often try to describe or explain primary sources. They tend to be works which summarize, interpret, reorganize, or otherwise provide an added value to a primary source.

Tertiary Sources

These are sources that index, abstract, organize, compile, or digest other sources. Some reference materials and textbooks are considered tertiary sources when their chief purpose is to list, summarize or simply repackage ideas or other information. Tertiary sources are usually not credited to a particular author.

WRI101 Into the Deep Past

• Comparison of Google, Scholar, Articles+, and Web of Science
• Working with Wikipedia
• Finding articles using a database
• Primary, secondary, and tertiary sources
• News sources
• Managing sources
• Academic Integrity at Princeton

Primary v Secondary Sources

The Standard Definition

In historical writing, a primary source is a document or physical object which was written or created during the time under study. These sources were present during an experience or time period and offer an inside view of a particular event. Some types of primary sources include: * ORIGINAL DOCUMENTS (excerpts or translations acceptable): Diaries, speeches, manuscripts, letters, interviews, news film footage, autobiographies, official records * CREATIVE WORKS: Poetry, drama, novels, music, art * RELICS OR ARTIFACTS: Pottery, furniture, clothing, buildings Examples of primary sources include: * Diary of Anne Frank - Experiences of a Jewish family during WWII * The Constitution of Canada - Canadian History * A journal article reporting NEW research or findings * Weavings and pottery - Native American history * Plato's Republic - Women in Ancient Greece What is a secondary source? A secondary source interprets and analyzes primary sources. These sources are one or more steps removed from the event. Secondary sources may have pictures, quotes or graphics of primary sources in them. Some types of seconday sources include: * PUBLICATIONS: Textbooks, magazine articles, histories, criticisms, commentaries, encyclopedias Examples of secondary sources include: * A journal/magazine article which interprets or reviews previous findings * A history textbook * A book about the effects of WWI Search by keyword for Primary Sources in the Main Catalog You can search the Main Catalog to find direct references to primary source material. Perform a keyword search for your topic and add one of the words below: (these are several examples of words that would identify a source as primary) * charters * correspondence * diaries * early works * interviews * manuscripts * oratory * pamphlets * personal narratives * sources * speeches * letters * documents

Another Possible Usage

PRIMARY SOURCE (more frequently PRIMARY TEXT) is sometimes used in a different sense in some types of classes. In a literature class, for example, the primary source might be a novel about which you are writing, and secondary sources those sources also writing about that novel (i.e., literary criticism). However, if you were writing about the literary criticism itself and making an argument about literary theory and the practice of literary criticism, some would use the term PRIMARY SOURCE to refer to the criticism about which you are writing, and secondary sources other sources also making theoretical arguments about the practice of literary criticism. In this second sense of primary source, whatever you are primarily writing ABOUT becomes the primary source, and secondary sources are those sources also writing about that source. Often this will be called the PRIMARY TEXT, but some people do use primary source with this meaning.

Tertiary Sources

Just so you can keep up with all the scholarly jargon about sources, a tertiary source is a source that builds upon secondary sources to provide information. The most common example is an encyclopedia. Consider a particular revolution as an historical event. All the documents from the time become primary sources. All the historians writing later produce secondary sources. Then someone reads those secondary sources and summarizes them in an encyclopedia article, which becomes a tertiary source. If someone then collected a bibliography of encyclopedia articles on the topic, that might be a quarternary source, but at that point the whole thing just becomes silly.

Evaluating Sources

• Critically Analyzing Information Sources Some questions to consider when evaluating sources.
• Distinguishing Scholarly Journals from other Periodicals You need a scholarly journal article. How do you know if you have one?

Evaluating Websites

FROM: Kapoun, Jim. "Teaching undergrads WEB evaluation: A guide for library instruction." C&RL News (July/August 1998): 522-523.

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Frequently asked questions

How can you tell if a source is primary or secondary.

To determine if a source is primary or secondary, ask yourself:

• Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
• Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
• Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of source are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews ). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism .

Frequently asked questions: Citing sources

A scientific citation style is a system of source citation that is used in scientific disciplines. Some commonly used scientific citation styles are:

• Chicago author-date , CSE , and Harvard , used across various sciences
• ACS , used in chemistry
• AMA , NLM , and Vancouver , used in medicine and related disciplines
• AAA , APA , and ASA , commonly used in the social sciences

There are many different citation styles used across different academic disciplines, but they fall into three basic approaches to citation:

• Parenthetical citations : Including identifying details of the source in parentheses —usually the author’s last name and the publication date, plus a page number if available ( author-date ). The publication date is occasionally omitted ( author-page ).
• Numerical citations: Including a number in brackets or superscript, corresponding to an entry in your numbered reference list.
• Note citations: Including a full citation in a footnote or endnote , which is indicated in the text with a superscript number or symbol.

A source annotation in an annotated bibliography fulfills a similar purpose to an abstract : they’re both intended to summarize the approach and key points of a source.

However, an annotation may also evaluate the source , discussing the validity and effectiveness of its arguments. Even if your annotation is purely descriptive , you may have a different perspective on the source from the author and highlight different key points.

You should never just copy text from the abstract for your annotation, as doing so constitutes plagiarism .

Most academics agree that you shouldn’t cite Wikipedia as a source in your academic writing , and universities often have rules against doing so.

This is partly because of concerns about its reliability, and partly because it’s a tertiary source. Tertiary sources are things like encyclopedias and databases that collect information from other sources rather than presenting their own evidence or analysis. Usually, only primary and secondary sources are cited in academic papers.

A Wikipedia citation usually includes the title of the article, “Wikipedia” and/or “Wikimedia Foundation,” the date the article was last updated, and the URL.

In APA Style , you’ll give the URL of the current revision of the article so that you’re sure the reader accesses the same version as you.

There’s some disagreement about whether Wikipedia can be considered a reliable source . Because it can be edited by anyone, many people argue that it’s easy for misleading information to be added to an article without the reader knowing.

Others argue that because Wikipedia articles cite their sources , and because they are worked on by so many editors, misinformation is generally removed quickly.

However, most universities state that you shouldn’t cite Wikipedia in your writing.

Hanging indents are used in reference lists in various citation styles to allow the reader to easily distinguish between entries.

You should apply a hanging indent to your reference entries in APA , MLA , and Chicago style.

A hanging indent is used to indent all lines of a paragraph except the first.

When you create a hanging indent, the first line of the paragraph starts at the border. Each subsequent line is indented 0.5 inches (1.27 cm).

APA and MLA style both use parenthetical in-text citations to cite sources and include a full list of references at the end, but they differ in other ways:

• APA in-text citations include the author name, date, and page number (Taylor, 2018, p. 23), while MLA in-text citations include only the author name and page number (Taylor 23).
• The APA reference list is titled “References,” while MLA’s version is called “ Works Cited .”
• The reference entries differ in terms of formatting and order of information.
• APA requires a title page , while MLA requires a header instead.

A parenthetical citation in Chicago author-date style includes the author’s last name, the publication date, and, if applicable, the relevant page number or page range in parentheses . Include a comma after the year, but not after the author’s name.

For example: (Swan 2003, 6)

To automatically generate accurate Chicago references, you can use Scribbr’s free Chicago reference generator .

APA Style distinguishes between parenthetical and narrative citations.

In parenthetical citations , you include all relevant source information in parentheses at the end of the sentence or clause: “Parts of the human body reflect the principles of tensegrity (Levin, 2002).”

In narrative citations , you include the author’s name in the text itself, followed by the publication date in parentheses: “Levin (2002) argues that parts of the human body reflect the principles of tensegrity.”

In a parenthetical citation in MLA style , include the author’s last name and the relevant page number or range in parentheses .

For example: (Eliot 21)

A parenthetical citation gives credit in parentheses to a source that you’re quoting or paraphrasing . It provides relevant information such as the author’s name, the publication date, and the page number(s) cited.

How you use parenthetical citations will depend on your chosen citation style . It will also depend on the type of source you are citing and the number of authors.

APA does not permit the use of ibid. This is because APA in-text citations are parenthetical and there’s no need to shorten them further.

Ibid. may be used in Chicago footnotes or endnotes .

Write “Ibid.” alone when you are citing the same page number and source as the previous citation.

When you are citing the same source, but a different page number, use ibid. followed by a comma and the relevant page number(s). For example:

• Ibid., 40–42.

Only use ibid . if you are directing the reader to a previous full citation of a source .

Ibid. only refers to the previous citation. Therefore, you should only use ibid. directly after a citation that you want to repeat.

Ibid. is an abbreviation of the Latin “ibidem,” meaning “in the same place.” Ibid. is used in citations to direct the reader to the previous source.

Signal phrases can be used in various ways and can be placed at the beginning, middle, or end of a sentence.

To use signal phrases effectively, include:

• The name of the scholar(s) or study you’re referencing
• An attributive tag such as “according to” or “argues that”
• The quote or idea you want to include

Different citation styles require you to use specific verb tenses when using signal phrases.

• APA Style requires you to use the past or present perfect tense when using signal phrases.
• MLA and Chicago requires you to use the present tense when using signal phrases.

Signal phrases allow you to give credit for an idea or quote to its author or originator. This helps you to:

• Establish the credentials of your sources
• Display your depth of reading and understanding of the field
• Position your own work in relation to other scholars
• Avoid plagiarism

A signal phrase is a group of words that ascribes a quote or idea to an outside source.

Signal phrases distinguish the cited idea or argument from your own writing and introduce important information including the source of the material that you are quoting , paraphrasing , or summarizing . For example:

“ Cognitive psychologist Steven Pinker (1994) insists that humans possess an innate faculty for comprehending grammar.”

If you’re quoting from a text that paraphrases or summarizes other sources and cites them in parentheses , APA and Chicago both recommend retaining the citations as part of the quote. However, MLA recommends omitting citations within a quote:

• APA: Smith states that “the literature on this topic (Jones, 2015; Sill, 2019; Paulson, 2020) shows no clear consensus” (Smith, 2019, p. 4).
• MLA: Smith states that “the literature on this topic shows no clear consensus” (Smith, 2019, p. 4).

Footnote or endnote numbers that appear within quoted text should be omitted in all styles.

If you want to cite an indirect source (one you’ve only seen quoted in another source), either locate the original source or use the phrase “as cited in” in your citation.

In scientific subjects, the information itself is more important than how it was expressed, so quoting should generally be kept to a minimum. In the arts and humanities, however, well-chosen quotes are often essential to a good paper.

In social sciences, it varies. If your research is mainly quantitative , you won’t include many quotes, but if it’s more qualitative , you may need to quote from the data you collected .

As a general guideline, quotes should take up no more than 5–10% of your paper. If in doubt, check with your instructor or supervisor how much quoting is appropriate in your field.

To present information from other sources in academic writing , it’s best to paraphrase in most cases. This shows that you’ve understood the ideas you’re discussing and incorporates them into your text smoothly.

It’s appropriate to quote when:

• Changing the phrasing would distort the meaning of the original text
• You want to discuss the author’s language choices (e.g., in literary analysis )
• You’re presenting a precise definition
• You’re looking in depth at a specific claim

To paraphrase effectively, don’t just take the original sentence and swap out some of the words for synonyms. Instead, try:

• Reformulating the sentence (e.g., change active to passive , or start from a different point)
• Combining information from multiple sentences into one
• Leaving out information from the original that isn’t relevant to your point
• Using synonyms where they don’t distort the meaning

The main point is to ensure you don’t just copy the structure of the original text, but instead reformulate the idea in your own words.

“ Et al. ” is an abbreviation of the Latin term “et alia,” which means “and others.” It’s used in source citations to save space when there are too many authors to name them all.

Guidelines for using “et al.” differ depending on the citation style you’re following:

To insert endnotes in Microsoft Word, follow the steps below:

• Click on the spot in the text where you want the endnote to show up.
• In the “References” tab at the top, select “Insert Endnote.”
• Type whatever text you want into the endnote.

If you need to change the type of notes used in a Word document from footnotes to endnotes , or the other way around, follow these steps:

• Open the “References” tab, and click the arrow in the bottom-right corner of the “Footnotes” section.
• In the pop-up window, click on “Convert…”
• Choose the option you need, and click “OK.”

To insert a footnote automatically in a Word document:

• Click on the point in the text where the footnote should appear
• Select the “References” tab at the top and then click on “Insert Footnote”
• Type the text you want into the footnote that appears at the bottom of the page

Footnotes are notes indicated in your text with numbers and placed at the bottom of the page. They’re used to provide:

• Citations (e.g., in Chicago notes and bibliography )
• Additional information that would disrupt the flow of the main text

Be sparing in your use of footnotes (other than citation footnotes), and consider whether the information you’re adding is relevant for the reader.

Footnotes appear at the bottom of the page they refer to. This is convenient for the reader but may cause your text to look cluttered if there are a lot of footnotes.

Endnotes appear all together at the end of the whole text. This may be less convenient for the reader but reduces clutter.

Both footnotes and endnotes are used in the same way: to cite sources or add extra information. You should usually choose one or the other to use in your text, not both.

An in-text citation is an acknowledgement you include in your text whenever you quote or paraphrase a source. It usually gives the author’s last name, the year of publication, and the page number of the relevant text. In-text citations allow the reader to look up the full source information in your reference list and see your sources for themselves.

If you are reusing content or data you used in a previous assignment, make sure to cite yourself. You can cite yourself just as you would cite any other source: simply follow the directions for that source type in the citation style you are using.

Keep in mind that reusing your previous work can be considered self-plagiarism , so make sure you ask your professor or consult your university’s handbook before doing so.

A credible source should pass the CRAAP test  and follow these guidelines:

• The information should be up to date and current.
• The author and publication should be a trusted authority on the subject you are researching.
• The sources the author cited should be easy to find, clear, and unbiased.
• For a web source, the URL and layout should signify that it is trustworthy.

Peer review is a process of evaluating submissions to an academic journal. Utilizing rigorous criteria, a panel of reviewers in the same subject area decide whether to accept each submission for publication. For this reason, academic journals are often considered among the most credible sources you can use in a research project– provided that the journal itself is trustworthy and well-regarded.

Academic dishonesty can be intentional or unintentional, ranging from something as simple as claiming to have read something you didn’t to copying your neighbor’s answers on an exam.

You can commit academic dishonesty with the best of intentions, such as helping a friend cheat on a paper. Severe academic dishonesty can include buying a pre-written essay or the answers to a multiple-choice test, or falsifying a medical emergency to avoid taking a final exam.

Academic dishonesty refers to deceitful or misleading behavior in an academic setting. Academic dishonesty can occur intentionally or unintentionally, and varies in severity.

It can encompass paying for a pre-written essay, cheating on an exam, or committing plagiarism . It can also include helping others cheat, copying a friend’s homework answers, or even pretending to be sick to miss an exam.

Academic dishonesty doesn’t just occur in a classroom setting, but also in research and other academic-adjacent fields.

To apply a hanging indent to your reference list or Works Cited list in Word or Google Docs, follow the steps below.

Microsoft Word:

• Highlight the whole list and right click to open the Paragraph options.
• Under Indentation > Special , choose Hanging from the dropdown menu.
• Set the indent to 0.5 inches or 1.27cm.

Google Docs:

• Highlight the whole list and click on Format >  Align and indent >  Indentation options .
• Under  Special indent , choose Hanging from the dropdown menu.

When the hanging indent is applied, for each reference, every line except the first is indented. This helps the reader see where one entry ends and the next begins.

For a published interview (whether in video , audio, or print form ), you should always include a citation , just as you would for any other source.

For an interview you conducted yourself , formally or informally, you often don’t need a citation and can just refer to it in the text or in a footnote , since the reader won’t be able to look them up anyway. MLA , however, still recommends including citations for your own interviews.

The main elements included in a newspaper interview citation across APA , MLA , and Chicago style are the names of the interviewer and interviewee, the interview title, the publication date, the name of the newspaper, and a URL (for online sources).

The information is presented differently in different citation styles. One key difference is that APA advises listing the interviewer in the author position, while MLA and Chicago advise listing the interviewee first.

The elements included in a newspaper article citation across APA , MLA , and Chicago style are the author name, the article title, the publication date, the newspaper name, and the URL if the article was accessed online .

In APA and MLA, the page numbers of the article appear in place of the URL if the article was accessed in print. No page numbers are used in Chicago newspaper citations.

Untitled sources (e.g. some images ) are usually cited using a short descriptive text in place of the title. In APA Style , this description appears in brackets: [Chair of stained oak]. In MLA and Chicago styles, no brackets are used: Chair of stained oak.

For social media posts, which are usually untitled, quote the initial words of the post in place of the title: the first 160 characters in Chicago , or the first 20 words in APA . E.g. Biden, J. [@JoeBiden]. “The American Rescue Plan means a $7,000 check for a single mom of four. It means more support to safely.”

MLA recommends quoting the full post for something short like a tweet, and just describing the post if it’s longer.

The main elements included in image citations across APA , MLA , and Chicago style are the name of the image’s creator, the image title, the year (or more precise date) of publication, and details of the container in which the image was found (e.g. a museum, book , website ).

In APA and Chicago style, it’s standard to also include a description of the image’s format (e.g. “Photograph” or “Oil on canvas”). This sort of information may be included in MLA too, but is not mandatory.

The main elements included in a lecture citation across APA , MLA , and Chicago style are the name of the speaker, the lecture title, the date it took place, the course or event it was part of, and the institution it took place at.

For transcripts or recordings of lectures/speeches, other details like the URL, the name of the book or website , and the length of the recording may be included instead of information about the event and institution.

The main elements included in a YouTube video citation across APA , MLA , and Chicago style are the name of the author/uploader, the title of the video, the publication date, and the URL.

The format in which this information appears is different for each style.

All styles also recommend using timestamps as a locator in the in-text citation or Chicago footnote .

Each annotation in an annotated bibliography is usually between 50 and 200 words long. Longer annotations may be divided into paragraphs .

The content of the annotation varies according to your assignment. An annotation can be descriptive, meaning it just describes the source objectively; evaluative, meaning it assesses its usefulness; or reflective, meaning it explains how the source will be used in your own research .

Any credible sources on your topic can be included in an annotated bibliography . The exact sources you cover will vary depending on the assignment, but you should usually focus on collecting journal articles and scholarly books . When in doubt, utilize the CRAAP test !

An annotated bibliography is an assignment where you collect sources on a specific topic and write an annotation for each source. An annotation is a short text that describes and sometimes evaluates the source.

The elements included in journal article citations across APA , MLA , and Chicago style are the name(s) of the author(s), the title of the article, the year of publication, the name of the journal, the volume and issue numbers, the page range of the article, and, when accessed online, the DOI or URL.

In MLA and Chicago style, you also include the specific month or season of publication alongside the year, when this information is available.

In APA , MLA , and Chicago style citations for sources that don’t list a specific author (e.g. many websites ), you can usually list the organization responsible for the source as the author.

If the organization is the same as the website or publisher, you shouldn’t repeat it twice in your reference:

• In APA and Chicago, omit the website or publisher name later in the reference.
• In MLA, omit the author element at the start of the reference, and cite the source title instead.

If there’s no appropriate organization to list as author, you will usually have to begin the citation and reference entry with the title of the source instead.

The main elements included in website citations across APA , MLA , and Chicago style are the author, the date of publication, the page title, the website name, and the URL. The information is presented differently in each style.

When you want to cite a specific passage in a source without page numbers (e.g. an e-book or website ), all the main citation styles recommend using an alternate locator in your in-text citation . You might use a heading or chapter number, e.g. (Smith, 2016, ch. 1)

In APA Style , you can count the paragraph numbers in a text to identify a location by paragraph number. MLA and Chicago recommend that you only use paragraph numbers if they’re explicitly marked in the text.

For audiovisual sources (e.g. videos ), all styles recommend using a timestamp to show a specific point in the video when relevant.

The abbreviation “ et al. ” (Latin for “and others”) is used to shorten citations of sources with multiple authors.

“Et al.” is used in APA in-text citations of sources with 3+ authors, e.g. (Smith et al., 2019). It is not used in APA reference entries .

Use “et al.” for 3+ authors in MLA in-text citations and Works Cited entries.

Use “et al.” for 4+ authors in a Chicago in-text citation , and for 10+ authors in a Chicago bibliography entry.

Check if your university or course guidelines specify which citation style to use. If the choice is left up to you, consider which style is most commonly used in your field.

• APA Style is the most popular citation style, widely used in the social and behavioral sciences.
• MLA style is the second most popular, used mainly in the humanities.
• Chicago notes and bibliography style is also popular in the humanities, especially history.
• Chicago author-date style tends to be used in the sciences.

Other more specialized styles exist for certain fields, such as Bluebook and OSCOLA for law.

The most important thing is to choose one style and use it consistently throughout your text.

The main elements included in all book citations across APA , MLA , and Chicago style are the author, the title, the year of publication, and the name of the publisher. A page number is also included in in-text citations to highlight the specific passage cited.

In Chicago style and in the 6th edition of APA Style , the location of the publisher is also included, e.g. London: Penguin.

A block quote is a long quote formatted as a separate “block” of text. Instead of using quotation marks , you place the quote on a new line, and indent the entire quote to mark it apart from your own words.

The rules for when to apply block quote formatting depend on the citation style:

• APA block quotes are 40 words or longer.
• MLA block quotes are more than 4 lines of prose or 3 lines of poetry.
• Chicago block quotes are longer than 100 words.

In academic writing , there are three main situations where quoting is the best choice:

• To analyze the author’s language (e.g., in a literary analysis essay )
• To give evidence from primary sources
• To accurately present a precise definition or argument

Don’t overuse quotes; your own voice should be dominant. If you just want to provide information from a source, it’s usually better to paraphrase or summarize .

Every time you quote a source , you must include a correctly formatted in-text citation . This looks slightly different depending on the citation style .

For example, a direct quote in APA is cited like this: “This is a quote” (Streefkerk, 2020, p. 5).

Every in-text citation should also correspond to a full reference at the end of your paper.

A quote is an exact copy of someone else’s words, usually enclosed in quotation marks and credited to the original author or speaker.

The DOI is usually clearly visible when you open a journal article on an academic database. It is often listed near the publication date, and includes “doi.org” or “DOI:”. If the database has a “cite this article” button, this should also produce a citation with the DOI included.

If you can’t find the DOI, you can search on Crossref using information like the author, the article title, and the journal name.

A DOI is a unique identifier for a digital document. DOIs are important in academic citation because they are more permanent than URLs, ensuring that your reader can reliably locate the source.

Journal articles and ebooks can often be found on multiple different websites and databases. The URL of the page where an article is hosted can be changed or removed over time, but a DOI is linked to the specific document and never changes.

When a book’s chapters are written by different authors, you should cite the specific chapter you are referring to.

When all the chapters are written by the same author (or group of authors), you should usually cite the entire book, but some styles include exceptions to this.

• In APA Style , single-author books should always be cited as a whole, even if you only quote or paraphrase from one chapter.
• In MLA Style , if a single-author book is a collection of stand-alone works (e.g. short stories ), you should cite the individual work.
• In Chicago Style , you may choose to cite a single chapter of a single-author book if you feel it is more appropriate than citing the whole book.

Articles in newspapers and magazines can be primary or secondary depending on the focus of your research.

In historical studies, old articles are used as primary sources that give direct evidence about the time period. In social and communication studies, articles are used as primary sources to analyze language and social relations (for example, by conducting content analysis or discourse analysis ).

If you are not analyzing the article itself, but only using it for background information or facts about your topic, then the article is a secondary source.

A fictional movie is usually a primary source. A documentary can be either primary or secondary depending on the context.

If you are directly analyzing some aspect of the movie itself – for example, the cinematography, narrative techniques, or social context – the movie is a primary source.

If you use the movie for background information or analysis about your topic – for example, to learn about a historical event or a scientific discovery – the movie is a secondary source.

Whether it’s primary or secondary, always properly cite the movie in the citation style you are using. Learn how to create an MLA movie citation or an APA movie citation .

Common examples of secondary sources include academic books, journal articles , reviews, essays , and textbooks.

Anything that summarizes, evaluates or interprets primary sources can be a secondary source. If a source gives you an overview of background information or presents another researcher’s ideas on your topic, it is probably a secondary source.

Common examples of primary sources include interview transcripts , photographs, novels, paintings, films, historical documents, and official statistics.

Anything you directly analyze or use as first-hand evidence can be a primary source, including qualitative or quantitative data that you collected yourself.

The Scribbr Citation Generator is developed using the open-source Citation Style Language (CSL) project and Frank Bennett’s citeproc-js . It’s the same technology used by dozens of other popular citation tools, including Mendeley and Zotero.

You can find all the citation styles and locales used in the Scribbr Citation Generator in our publicly accessible repository on Github .

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Research Sources: Primary vs. Secondary: Home

What are primary & secondary sources.

• Primary Sources
• Secondary Sources
• Finding Primary Sources
• Library Primary Sources
• Data & Statistics

Primary sources  provide the raw data you use to support your arguments. Some common types of primary resources include manuscripts, diaries, court cases, maps, data sets, experiment results, news stories, polls, or original research.  In many cases what makes a primary resource is contextual.  For example, a biography about Abraham Lincoln is a secondary resource about Lincoln. However, if examined as a piece of evidence about the nature of biographical writing, or as an example of the biographer's writing method it becomes a primary resource.

However the category of primary or secondary is often determined by how the source is being used. Often newspapers are considered secondary sources as journalists report, analyze, and interpret events and the experience of others. Newspapers can also be used as primary sources. If you are researching how American attitudes on welfare spending have changed during the past twenty years, newspaper editorials can serve as primary sources of public opinion. Librarians and your instructor can help you identify primary and secondary sources for your projects.

Secondary Sources  analyze primary sources, using primary source materials to answer research questions.  Secondary sources may analyze, criticize, interpret or summarize data from primary sources. The most common secondary resources are books, journal articles, or reviews of the literature. Secondary sources may also be primary sources. For example if someone studies the nature of literary criticism in the 19th century then a literary critique from the 19th century becomes a primary resource.

There are so many types of primary resources it is important to define your parameters by:

• Discipline (e.g. art, history, physics, political science)
• Format (e.g. book, manuscript, map, photograph)
• Type of information you need (e.g. numerical data, images, polls, government reports, letters)

On the next tab, Library Primary Resources, there are examples of terms you may search to find books with primary resource and links to archival collections at Hiram College Library.

Hiram Primary Source Subjects Examples

Chicago Ill Maps

Jobs Steve 1955-2011 Interviews

Pound Ezra 1885-1972  Correspondence

Presidents United States Archives

Roosevelt Eleanor 1884-1962 Diaries

United States Population Statistics

Hiram also has a number of  Newspapers  that may be primary sources. 

Search for books using Hiram College Library  catalog .

Use the Books Images & More tab, Advanced search: Subject. The subjects listed above are examples of ways to locate books that contain primary resources.

U nited States Census Data

Centers for Disease Control (CDC)

World Health Organization (WHO)

Nation Master

National Center for Education Statistics

Current statistical information from all sectors of the United States economy including the census, budget, economic, and other sets. (Was information formerly grouped together in STAT-USA.

Compiles statistics on gender topics at the country level with statistics drawn from a variety of sources. Updated as additional statistics become available.

• Sage Data Foundations This link opens in a new window Explore a curated collection of United States statistics in Data Planet Foundations. With this dynamic tool, you can scan and search the contents of billions of datasets, compare and contrast variables of interest, and create customized views in tables, maps, rankings, and charts. Views also include descriptive summaries of the datasets and data sources. Datasets cover a wide range of subjects – including business, finance, banking, economics, sociology, political science, demography, agriculture, education, international studies, criminal justice, housing and construction, labor and employment, energy resources and industries, and more. Sources include public, private/commercial, and nongovernmental organizations. Note: Data Planet Data will not be updated after 2021.

Primary vs. Secondary vs. Tertiary

Primary Source : An authoritative document relating to a subject, which is used in the preparation of a later work, such as an original record or a contemporary document.  In the humanities, a primary source is the document being analyzed; in the sciences it is a journal article reporting the results of original research.  Primary sources are also called original sources or source material.

Secondary Source : A publication that digests, analyzes, evaluates, and/or interprets the information in primary sources.

Tertiary Source :  A source that compiles, analyzes, and/or digests secondary sources.

Based on documents from:

William Madison Randall Library, University of North Carolina Wilmington

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Primary, Secondary, and Tertiary Sources: A Quick Guide: Primary Sources

• Primary Sources
• Secondary Sources
• Tertiary Sources

What is a Primary Source?

Here are two definitions that try to capture the elusive nature of primary documents.

A definition from Cornell University:

A definition from Yale University:

"What are primary sources? Primary sources provide firsthand testimony or direct evidence concerning a topic or question under investigation.

They are usually created by witnesses or recorders who experienced the events or conditions being documented. Often these sources are created at the time when the events or conditions are occurring, but primary sources can also include autobiographies, memoirs, and oral histories recorded later." [ Primary Sources at Yale . Yale University.] Also on this site: Primary Sources come in all shapes and sizes.

A Photograph Can be a Primary Source

Antietam, Md. President Lincoln with Gen. George B. McClellan and group of officers. [October 3, 1862] Gardner, Alexander, 1821-1882, photographer. Source : Library of Congress, Prints & Photographs Division

Online Collections of Primary Sources: Examples

• Library of Congress. Digital Collections. Washington: Library of Congress, National Digital Library Program, 1994- .
• History: Primary Sources Databases. Cornell University Library.
• Making of America: The Cornell University Library MOA collection Ithaca, NY: Cornell University Library, 1996- .
• Valley of the Shadow: Two Communities in the American Civil War

Permissions Information

If you wish to use or adapt any or all of the content of this Guide go to Cornell Library's Research Guides Use Conditions to review our use permissions and our Creative Commons license.

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• URL: https://guides.library.cornell.edu/sources

Primary, Secondary and Tertiary Sources

Primary sources, secondary sources, tertiary sources, primary and secondary sources in law.

This work ( Constitution of the United States, page 1), identified by National Archives and Records Administration , is free of known copyright restrictions.

This guide will introduce students to three types of resources or sources of information: primary, secondary, and tertiary.

Definition of a Primary Source: 

Primary sources are firsthand documents that provide direct evidence on your topic.   The Library of Congress refers to them as the "raw materials of history — original documents and objects which were created at the time under study. They are different from secondary sources, accounts or interpretations of events created by someone without firsthand experience."

A primary source is most often created during the time the events you are studying occurred, such as newspaper articles from the period, correspondence, diplomatic records, original research reports and notes, diaries etc. They may also include items created after the events occurred, but that recount them such as autobiographies and oral histories.

Definition of a Secondary Source: 

Secondary Sources are accounts written after the fact with the benefit of hindsight. They are interpretations and evaluations of primary sources. Secondary sources are not evidence, but rather commentary on and discussion of evidence. ¹

¹​ Yale University Library, "Primary, secondary & tertiary sources" http://guides.library.yale.edu/content.php?pid=129904&sid=1196376

Definition of a Tertiary Source

A tertiary source presents summaries or condensed versions of materials, usually with references back to the primary and/or secondary sources. 

Primary Source in Law: 

A statement of the law itself from a governmental entity, such as a court, legislature, executive agency, President or Governor.  

Secondary Source in Law: 

Materials that discuss, explain, interpret, and analyze what the law is or what it should be.

• Last Updated: Nov 10, 2020 9:30 AM
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Primary, Secondary, and Tertiary Sources of Information in the Sciences

• Types of Information Sources
• Videos about Information Sources
• Science Databases and Popular Science Sources

A Word about Wikipedia

• Wikipedia: A Good Starting Point But NOT A Citable Source

What are Primary, Secondary and Tertiary Sources of Information?

What are the different types of sources of information used in research .

Generally, there are three basic types of information sources in research including primary, secondary, and tertiary.  They are as follows:

Primary Sources:  Primary sources of information are first hand accounts of research or an event including original scholarly research results, raw data, testimony, speeches, historic objects or other evidence that provides unique and original information about a person or an event. These sources were created at the time which the observation or event occurred but can also be created later by an eyewitness.  Primary sources allow researchers direct access to original ideas, events, and data. Some examples of primary sources include published original scholarly research articles, original creative works, and eyewitness accounts of contemporaneous events.

Secondary Sources:    Secondary sources analyze, synthesize, evaluate, and interpret primary sources (or other secondary sources). Secondary sources are created after an event has occurred and are written by someone who did not experience or observe the event first hand.  Some examples of secondary sources include articles that interpret original scholarly research results and critiques of original creative works.  Secondary sources are not evidence, but rather comment on and discuss previous evidence.

Tertiary Sources:   Tertiary sources of information provide broad overviews or condensed narratives of topics. They analyze and summarize the information in primary and secondary sources in order to provide background on a idea, event, or topic. Tertiary resources often provide data in a convenient form and provide context of the topic for a frame of reference.  Some examples of tertiary sources include textbooks, dictionaries, encyclopedias, and almanacs.

Examples of Information Source Types

Elements of a Scholarly Research Article

Common elements of a scholarly article:

• Authors and their credentials
• Introduction including background information on subject, literature review, statement of research problem, and hypothesis
• Limitations of research
• Recommendations for further research

Quick Summary

What is Pop-sci?

What is pop-sci?

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• URL: https://libraryguides.uwsp.edu/InformationSourcesInTheSciences