RefWorks is a web-based program that allows you to create your own personal database of references.
Users can import references from a search performed in an online database automatically, or enter references manually.
RefWorks also interfaces directly with Word, making it easy to import citations and incorporate them into your writing as properly formatted footnotes or in-text citations according to the writing style of your choice (MLA, APA, and hundreds others).
Link to set up your own RefWorks account (and other citation tools such as Zotero)
Even if you use the citation tool within a website, e journal, or Google Scholar, you MUST double check your work through a credible source such as Excelsior OWL. You can't rely on the citation generator of Google Scholar, etc to have all of the details correct and in order.
APA's Style Blog is also a good tool as is the Style and Grammar Guidelines.