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How to cite your sources
Below are links to guides for the three major styles used for most academic papers or research in the humanities, social sciences, and some scientific disciplines:
APA Style Guide (Purdue)
From the American Psychological Association. Often preferred in the fields of psychology and many other social sciences.
Chicago Manual of Style Guide (Purdue)
From the University of Chicago Press. Often preferred in history and many other disciplines.
MLA Style Guide (Purdue)
From the Modern Language Association. Often preferred in the fields of literature, arts, humanities, and in some other disciplines.
There are a few free online tools to help you manage your citations across projects:
Why cite your sources?
"Ethics, copyright laws, and courtesy to readers require authors to identify the sources of direct quotations and of any facts or opinions not generally known or easily checked."
Chicago Manual of Style, 15th edition (Chicago: Chicago Univ. Press), p. 594.