Secondary Source

A source that analyzes, interprets, or discusses information from primary sources. Examples include review articles, textbooks, and critical analyses.

Why it matters

Secondary sources help you understand how scholars have interpreted primary evidence and where the academic debate currently stands. They are essential for literature reviews and for situating your own research within the broader scholarly conversation. Citing secondary sources shows you understand the existing body of knowledge on your topic.

How to use

Use secondary sources to support your analysis, provide context, and identify gaps in existing research. When writing a literature review, secondary sources like review articles are an efficient starting point. Always read the secondary source yourself rather than relying on how another author summarized it, and trace important claims back to the primary source when possible.

In academic writing

Most undergraduate papers rely heavily on secondary sources such as textbooks, review articles, and scholarly analyses. In graduate research, students are expected to engage more directly with primary sources while using secondary sources to frame their analysis. Understanding the distinction between primary and secondary sources is a core information literacy skill taught across all disciplines.