A "citation" is the way you tell your readers that certain material in your work came from another source. It also gives your readers the information necessary to find that source again, including:
Giving credit to the original author by citing sources is the only way to use other people's work without plagiarizing. But there are a number of other reasons to cite sources:
Not at all. On the contrary, citing sources actually helps your reader distinguish your ideas from those of your sources. This will actually emphasize the originality of your own work.
Whenever you borrow words or ideas, you need to acknowledge their source. The following situations almost always require citation:
From: Plagiarism.org http://www.plagiarism.org/learning_center/what_is_citation.html Accessed on September 21, 2008.
"The Punishable Perils of Plagiarism" from TED-Ed