Primary Sources are original documents about an event, person, object, product or work of art that was written or created by someone directly involved in the event or experience and presenting information in its original form.
Examples: Autobiographies, Letters, Diaries, Interview Transcripts, Statistical data from research study
Secondary Sources - Not original but were created using an original source. These are anything that describes, interprets, evaluates, or analyzes information from primary sources.
Examples: Encyclopedias, Biographies, Reviews, Books, Textbooks and Articles that analyze and summarize information from the primary research. The authors of the secondary sources did not do studies or experiments.