We sometimes get requests for bibliographic citation help, so I thought this would be useful:
WorldCat records in the WorldCat, Ebooks and WorldCat Dissertations databases on the OCLC FirstSearch service now include a "Cite this Item" link.
When users select "Cite this item" in the External Resources links within records from these databases, they will see the citation for a selected record in the reference standard for five common styles: APA, Chicago, Harvard, MLA and Turabian. Users may copy and paste the needed format into a bibliography.
This also works in Worldcat.org.