Try these Citation Generators:
Not so long ago students spent a great deal of time carefully formatting their bibliography. Fortunately, computers can help us with this task. To save yourself time, try one of these citation generators. You input the data and your citation will be automatically formatted for you. However, the citation will only be as good as the data you put in so be careful and accurate.
Try BibMe: http://www.bibme.org/
Try the free version of EasyBib: http://www.easybib.com/