When should the name of the library from which I have retrieved my source be included in a works-cited-list entry?

Note: This post relates to content in the eighth edition of the MLA Handbook. For up-to-date guidance, see the ninth edition of the MLA Handbook.

Include the name of the library in the publisher slot on the MLA format template if the library is the publisher of the work or in the location slot if you are citing a unique work available only at the library, like a manuscript in an archive:

Baron, Sabrina Alcorn, et al., editors. Agent of Change: Print Culture Studies after Elizabeth L. Eisenstein. U of Massachusetts P / Center for the Book, Library of Congress, 2007.

Chaucer, Geoffrey. The Canterbury Tales. Circa 1400-10, British Library, London, Harley MS 7334.