Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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