APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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