Plagiarism is defined in the Oxford English Dictionary (3rd ed) as "The action or practice of taking someone else's work, idea, etc., and passing it off as one's own; literary theft" ("Plagiarism"). If you do not cite your sources both within your essay and in a Works Cited or bibliography page, you are plagiarizing, or stealing, someone else's work.
Any student found in the act of cheating or plagiarism may be subject to disciplinary action (Atlantic Cape Policy No. 209).
For additional information and guidance see the Guide on Academic Writing : Plagiarism and Citing Sources
The most recent edition of the rule book for APA style.
This edition is a little dated, but has good explanations.
Check out this Citation Guide to see examples of citations in APA format.
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