Zotero is a free, open-source reference management option and an alternative to RefWorks. If you just want to generate one or two quick citations, there is a ZoteroBib option on this page that allows you to do just that.
RefWorks helps you organize your resources, cite, and create bibliographies. Click on "Create an account" on the bottom of the screen and create an account using your AU email address.
This website has sample citations and formatting assistance. Look on the left side of their page to locate their resources on APA, MLA, and Chicago styles.