Primary, Secondary and Tertiary Sources: Home

Here, to support your college research efforts, you learn to identify and differentiate between primary, secondary and tertiary sources of information. You will find explanations and examples of each type of source, with helpful links often provided.

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This guide explains different research source types (primary, secondary and tertiary) and presents NYIT Library and Internet resources exemplifying each. Often, links to illustrations and examples supportive of learning are provided.

OPTION: Watch a video summary HERE.  Source:  The David L. Rice Library  The University of Southern Indiana

In this guide, topic sections, each with its own tab above, are as follows:

• Primary, Secondary and Tertiary Sources: A Quick Look (Definitions and Differences) (This may be all you need!)
• Primary Sources In Depth (print, online/electronic) / With examples
• Secondary Sources In Depth (print, online/electronic) / With examples
• Tertiary Sources In Depth (print, online/electronic / With examples
• Discipline Grid: How Source Categories Differ among Academic Discplines
• MORE on Primary, Secondary and Tertiary Sources
• Frequently Asked Questions (FAQs) about the Library

IMPORTANT NOTE: What is considered a primary, secondary or tertiary source can vary, depending on the discipline. Examples and further explanation follow.

KwikTake by Example:

To those studying history: PRIMARY SOURCE: Ben Franklin's letters SECONDARY SOURCE: A biography of Ben Franklin TERTIARY SOURCE: A short encyclopedia of America's founding fathers with coverage of Ben Franklin Franklin wrote in his diary over 200 years ago. It's an original document dating from Franklin's time. It's a PRIMARY source. The biography of Franklin was written two centuries later. It's a SECONDARY source, possibly based in part on primary sources. The short encyclopedia distills any number of primary and secondary sources into a short survey article on Franklin, making it a TERTIARY source.

To those studying art: PRIMARY SOURCE:  A painting by Renoir SECONDARY SOURCE:  A book analyzing Renoir's art TERTIARY SOURCE:  An art encyclopedia containing an article on Renoir The painting is an original work, done by Renoir in his time, making it a PRIMARY source. Written many years later, the contemporary book commenting on Renoir's art is a SECONDARY source. The art encyclopedia has many articles, One article, which draws from many sources, is about Renoir. This encyclopedia is a TERTIARY source.