APA (7th ed.) Citation

Immroth, J. P. (1971). A guide to the Library of Congress classification (2d ed.). Libraries Unlimited, Inc.

Chicago Style (17th ed.) Citation

Immroth, John Phillip. A Guide to the Library of Congress Classification. 2d ed. Littleton, Colo: Libraries Unlimited, Inc, 1971.

MLA (9th ed.) Citation

Immroth, John Phillip. A Guide to the Library of Congress Classification. 2d ed. Libraries Unlimited, Inc, 1971.