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A citation is a way of listing a resource which has been used in a research paper. A citation's style can vary depending on which paper formatting style you are instructed to use. For more information on citation styles and how to use them, please see our Citing Sources & Style Manuals Research Guide. If you are looking to find the APA Style Manual, please see the APA Style Manual database and APA Style Manual Research Guide. Additionally, if you are looking to find a resource from its citation, you can use our Citation Linker.