APA (7th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division, Gale Research Company, & Library of Congress. Classification Division. (1955). Classification. Class P, P-PA: Philology, linguistic, classical philology, classical literature. [U. S. Government Printing Office].

Chicago Style (17th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division, Gale Research Company, and Library of Congress. Classification Division. Classification. Class P, P-PA: Philology, Linguistic, Classical Philology, Classical Literature. Washington: [U. S. Government Printing Office], 1955.

MLA (9th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division, et al. Classification. Class P, P-PA: Philology, Linguistic, Classical Philology, Classical Literature. [U. S. Government Printing Office], 1955.