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Find tools and resources for research in any biology course.

Types of sources

When it comes to selecting sources, we most often want primary, peer-reviewed articles. What does that mean?

Sources can be categorized in a couple ways: They may be scholarly or non-scholarly, and under scholarly sources, they may be primary or secondary.

Scholarly and non-scholarly sources

Primary and secondary sources

Identifying scholarly articles

To help identify parts of a scholarly article, check out this interactive tutorial created by Andreas Orphanides at NCSU Libraries.