APA (7th ed.) Citation

United States Library of Congress Classification Division. (1956). Classification. Class J: Political science (2nd ed. with supplementary pages.). U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States Library of Congress Classification Division. Classification. Class J: Political Science. 2nd ed. with supplementary pages. Washington: U. S. Government Printing Office, 1956.

MLA (9th ed.) Citation

United States Library of Congress Classification Division. Classification. Class J: Political Science. 2nd ed. with supplementary pages. U. S. Government Printing Office, 1956.