APA (7th ed.) Citation

Library of Congress. Classification Division & Voegelein, L. B. (1947). Classification. Class A, general works, polygraphy (3rd edition.). U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

Library of Congress. Classification Division and L. Belle Voegelein. Classification. Class A, General Works, Polygraphy. 3rd edition. Washington: U. S. Government Printing Office, 1947.

MLA (9th ed.) Citation

Library of Congress. Classification Division and L. Belle Voegelein. Classification. Class A, General Works, Polygraphy. 3rd edition. U. S. Government Printing Office, 1947.