Textual evidence such as passages of text or lines of a poem.
Details from an image, a film, or a work of art. Scholarly books and articles that interpret evidence.
Results of field research such as interviews, observations, or surveys. Scholarly articles that report findings from experiments.
Passages of a musical composition. Statistics from government agencies.
Critical essays that analyze original works.
Primary sources: photographs, letters, maps, chronicles, government documents.
Scholarly interpretations of primary sources: books and articles
Results of field research such as interviews, observations, or surveys.
Data from original experiments.
Statistics (gathered by governmental and other agencies).
Scholarly interpretations of data, statistics experiments and field research results (books and articles).
Data from original experiments
Interpretations of data harvested in experiments presented in papers, articles, books.