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Primary sources are also sets of data, such as health statistics, which have been tabulated, but not interpreted. 1  Journals or Periodicals: main type of publication in which scientific research is reported. 2  May be published by learned societies or by commercial publishers. 3  A researcher(s) submits an article to a journal.
For every source you use, you will need to think of the questions above to determine which category they fit into - primary or secondary - and how much you can trust what they say. Primary Sources Primary sources are informational sources from the time of the event. 1  Examples of primary sources: 2  Autobiographies. 3  Diaries. 4  Documents. 5  Eyewitness accounts. 6  Film footage. 7  Laws. 8  Letters. 9  Newspaper articles. 10  Novels. 11  Objects from the time. 12  Oral histories. 13  Photographs. 14  Poems, art, music. 15  Speeches.