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How to Evaluate Information Sources: What are secondary sources?

Secondary sources

Secondary sources of information are based on primary sources. They are generally written at a later date and provide some discussion, analysis, or interpretation of the original primary source. Examples of secondary sources include:

  • review articles or analyses of research studies about the same topic (also often in peer-reviewed publications)
  • biographies, reviews, or critiques of an author
  • analyses of original documents or archival material

TIP:  What is considered primary, secondary, or tertiary information may vary according to your field of study. When in doubt, ask your professor.