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Secondary sources interpret, comment on, analyze, or review information from primary sources and can be written after the time under study. Examples include
Articles in periodicals (journals, magazines, newspapers, etc.) that review or interpret previous research or events
Most non-fiction books, including textbooks, biographies, and history books
Scholarly vs. Popular Sources
While many of our library databases allow you to filter your search results to scholarly articles, it is still helpful to know the differences between popular and scholarly sources to ensure that you are fulfilling your assignment requirements. This infographic summarizes some of the main distinctions between the two types of sources.