RefWorks
As part of the UA community, you have free access to this citation resource in perpetuity. Use it for any research-related project that you are working on. It will download all the sources you use for a project and format them into the citation style that is requested by your professor. Set up your free account.
HBS Citation Guide
Examples of how to cite many business sources. For those who still like old school citation compilation and haven't made the leap to RefWorks.