APA (7th ed.) Citation

Library of Congress. (1931). Rules for filing cards in deck catalogue. U.S. GPO.

Chicago Style (17th ed.) Citation

Library of Congress. Rules for Filing Cards in Deck Catalogue. Washington: U.S. GPO, 1931.

MLA (9th ed.) Citation

Library of Congress. Rules for Filing Cards in Deck Catalogue. U.S. GPO, 1931.