APA (7th ed.) Citation

United States Library of Congress. Classification Division. (1955). Classification. Class P, P-A: Philology, linguistics, classical philology, classical literature (with supplementary pages). U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States Library of Congress. Classification Division. Classification. Class P, P-A: Philology, Linguistics, Classical Philology, Classical Literature (with Supplementary Pages). Washington: U. S. Government Printing Office, 1955.

MLA (9th ed.) Citation

United States Library of Congress. Classification Division. Classification. Class P, P-A: Philology, Linguistics, Classical Philology, Classical Literature (with Supplementary Pages). U. S. Government Printing Office, 1955.