There are various established formats for Citations and Bibliographies, including APA, Chicago, Harvard & MLA. Chicago even has two different formats, but Word only supports one of them. To use one, you simply add the source to Word, using References>Manage Sources, choose the appropriate referencing format from the Style dropdown, then insert a citation and/or bibliography. You can change the referencing format to see how each appears, but a document can support only one format at a time.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]