Citation management systems save you lots of time by allowing you to store your references in one place, share them with other people, and automatically generate a bibliography while writing your paper.
You can capture citations electronically from journals or databases (or enter them manually), and then organize them into folders for later use. You can also share these groups of reference with your co-authors.
When it comes time to write your paper, use the Word plug-in from the citation management program to insert your citations and automatically create a reference list in your preferred or required format for publication (e.g. AMA, APA).