APA (7th ed.) Citation

LIBRARY OF CONGRESS. Classification Division. (1927). Classification. Class Z. Bibliography and Library Science (3 ed.). Government Printing office.

Chicago Style (17th ed.) Citation

LIBRARY OF CONGRESS. Classification Division. Classification. Class Z. Bibliography and Library Science. 3 ed. Washington: Government Printing office, 1927.

MLA (9th ed.) Citation

LIBRARY OF CONGRESS. Classification Division. Classification. Class Z. Bibliography and Library Science. 3 ed. Government Printing office, 1927.