If you're working on a long term project, such as an article you hope to publish, you'll want to come up with a way to manage your citations. GW Libraries provides support for Zotero and Refworks.
These tools allow you to capture your citations, organize them into folders, and create outputs in various citation formats. Zotero is a free resource. Refworks is paid for by GW and is made available at no charge to GW students and alumni. Try them out to see which one works best for you!