APA (7th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division. (1957). Classification. Class P, subclass PQ, part 1: French literature (with supplementary pages). [U. S. Government Printing Office].

Chicago Style (17th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division. Classification. Class P, Subclass PQ, Part 1: French Literature (with Supplementary Pages). Washington: [U. S. Government Printing Office], 1957.

MLA (9th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division. Classification. Class P, Subclass PQ, Part 1: French Literature (with Supplementary Pages). [U. S. Government Printing Office], 1957.