LSU Libraries
Evaluation of Information Sources
Part I, Types of Information Sources

Secondary Sources:

A Secondary Source of information is something which comes after the fact. It is literature that analyzes, interprets, relates or evaluates a primary source or other primary sources. Textbooks, encyclopedias, dictionaries, any book or article which is an interpretation of events, or of primary sources are considered secondary sources.

This does not mean that secondary materials are not good sources of information. Often by collecting data from a number of different primary sources, new ideas and insights into an event may be found and written about, becoming a great secondary source of information!


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