A citation manager is a tool which helps you to store, organize and output your citations in the format you prefer.
Here is a summary - see also the full comparison chart below.
Easy-to-use web-based product available to all Pacific users (www.refworks.com). RefWorks allows you to import references from PacifiCat and many of Pacific's subscription databases. You can conveniently compile a list of sources you intend to read--as you identify them--and save the list online.
Available to all Pacific users (www.myendnoteweb.com). EndNote Web allows you to import references from PacifiCat and several of our subscription databases. For many databases, not as seamlessly as RefWorks.
Easy-to-use open source tool (http://www.zotero.org/) that is accessible via the web—works right in your Firefox browser. Using Zotero, it is easy to capture and save citations found on webpages, and to add notes and other information to saved citations for efficient organization. Lacks the storage capabilities of Refworks and EndNote Web.