If you want to keep track of your references as you are finding them, and if you use Mozilla Firefox, try Zotero. It's a free Mozilla add-on that makes it easy to save and correctly format your article citations as you find your sources, whether in library databses or on the general web.
In addition, you may want to try a citation generator such as KnightCite, this one from Griffith, or Referencite -- but they're not always perfect, so check with a style guide too.