Appendix B: Documenting Sources: APA
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AP Photo/The Journal and Courier, Tom Leniniger
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American Psychological Association (APA) documentation style is commonly used in the social sciences. In APA style, parenthetical references refer readers to sources in the list of references at the end of the paper.* Parenthetical citations must be provided for all sources that are not common knowledge, whether you are summarizing, paraphrasing, or quoting.