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How to Identify Primary, Secondary, and Tertiary Sources: Home

Ways to Determine Source Type

If you think about the publication details of the information and consider the following you will often find your answer:

Timing of the Event Recorded

If the article was composed close to the time of the event recorded, chances are it is primary material. For instance, a letter written by a soldier during the Vietnam War is primary material, as is an article written in the newspaper or a soldier's letter home during the Civil War. However, an article written analyzing the results of the battle at Gettysburg is secondary material.

Rhetorical Aim of the Written Item

Often, an item that is written with a persuasive or analytical aim is secondary material. Authors of these materials have digested and interpreted the event rather than reported on it.

Context of the Researching Scholar

Primary materials for a critic studying the literature of the Civil War are different from primary materials for a historian studying Civil War prisons. The critic's primary materials are the poems, stories, and films of the era. The research scientist's primary materials would be the diaries and writings of slave families.

What are Primary, Secondary, and Tertiary Sources?

Primary Resources

These are original sources of information on which other research is based, including documents such as poems, diaries, court records, interviews, surveys, and fieldwork. Primary materials also include research results generated by experiments, which are published as journal articles in some fields of study, or as sets of data such as census statistics which have been tabulated but not interpreted.

Secondary Resources

These sources describe or analyze the primary source. Examples of secondary sources include dictionaries, encyclopedias, textbooks, and books and articles that interpret or review research works.

Tertiary Resources

These sources list, compile, digest, or index primary or secondary sources. Examples of tertiary sources include indexes, handbooks, digests, and almanacs.

See the tab titled Cycle of Information for a more detailed description of the differences between these resources.

Search@UW 

Try our new discovery tool where you can find books in the UWSP collection, full text articles from scholarly journals and magazines, online videos, as well as photographs, documents and maps from the UW digitial collections. 

Then, with one click, go beyond our holdings at UWSP and order books from other UW libraries and search for articles beyond our subscriptions. Search@UW is multidisciplinary, so it's a great starting point for research across all majors.  It can be a real time saver, since it combines what have historically been separate search venues in a single site, making your search experience faster and easier.