There are many online resources available to help you correctly cite your bibliographic sources. Here are two of the most popular.
EasyBib is citation software which is openly available to everyone just by creating a free account. It automatically formats references and bibliographies and is very easy to use. Most citations can be exported to Easybib straight from the databases.
Check with your professors about the preferred citation style for your course. A guide to the Library's citation manuals can be found at our guide page, and below are online guides to three of the most popular citation styles: