Zotero is a free citation management tool, available at Zotero.org. It keeps track of your sources as you do your research in library E-resources or on the Web. And when it’s time to write a paper, Zotero can handle the citation formatting for you. You won’t have to worry about putting a semicolon in the right place again.
Zotero is a program you download to your computer desktop. You can sync your data to the online component of the program at Zotero.org.