APA (7th ed.) Citation

United States Library of Congress Classification Division. (1954). Classification. Class Q: Science (5th ed., with supplementary pages.). U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States Library of Congress Classification Division. Classification. Class Q: Science. 5th ed., with supplementary pages. Washington: U. S. Government Printing Office, 1954.

MLA (9th ed.) Citation

United States Library of Congress Classification Division. Classification. Class Q: Science. 5th ed., with supplementary pages. U. S. Government Printing Office, 1954.