APA (7th ed.) Citation

U.S. Library of Congress Classification Division. (1954). Classification. Class D: Universal and old world history, European War, D501-725 (2nd. ed. as in force Aug. l933, with supplementary pages.). U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Library of Congress Classification Division. Classification. Class D: Universal and Old World History, European War, D501-725. 2nd. ed. as in force Aug. l933, with supplementary pages. Washington: U. S. Government Printing Office, 1954.

MLA (9th ed.) Citation

U.S. Library of Congress Classification Division. Classification. Class D: Universal and Old World History, European War, D501-725. 2nd. ed. as in force Aug. l933, with supplementary pages. U. S. Government Printing Office, 1954.