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Citation management tools such as EndNote Web, Mendeley and Zotero allow you to organize and retrieve information, such as citations for books, articles, and Web sites, by interfacing with library databases. The citation manager then works with word-processing software to insert citations into a paper and create a properly formatted bibliography.
EndNote Web: http://www.myendnoteweb.com/
Mendeley: http://www.mendeley.com/
Zotero: https://www.zotero.org/
Comparison
If you need assistance with any of these programs please contact me