APA (7th ed.) Citation

Library of Congress Subject Cataloging Division. (1915). Classification. Class A: General works, polygraphy. Govt. print. off.

Chicago Style (17th ed.) Citation

Library of Congress Subject Cataloging Division. Classification. Class A: General Works, Polygraphy. Washington: Govt. print. off, 1915.

MLA (9th ed.) Citation

Library of Congress Subject Cataloging Division. Classification. Class A: General Works, Polygraphy. Govt. print. off, 1915.