Primary/Secondary sources

Primary sources

Secondary sources

Experiments, data-gathering surveys, and interviews, detailed observations, and the examination of historical documents          Novels, short stories, poems, plays, music          Paintings, sculpture, photographs, maps          Speeches          Diaries, letters, journals          Interviews with witnesses and participants          Government records          Published results         Collections of data         Collections of observations

Collections of print materials housed in  libraries and internet (database)          Histories          Biographies          Literacy criticism           Reviews           Publications interpreting the results or experiments           Reviews of several studies or experiments