APA (7th ed.) Citation

Immroth, J. P. (1971). A guide to the library of Congress Classification (2. ed.). Libr. Unlimited.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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