APA (7th ed.) Citation

U.S. Library of Congress. Subject Cataloging Division. (1959). Classification: Class H (3rd ed. with supplementary pages.). The Congress.

Chicago Style (17th ed.) Citation

U.S. Library of Congress. Subject Cataloging Division. Classification: Class H. 3rd ed. with supplementary pages. Washington: The Congress, 1959.

MLA (9th ed.) Citation

U.S. Library of Congress. Subject Cataloging Division. Classification: Class H. 3rd ed. with supplementary pages. The Congress, 1959.