APA (7th ed.) Citation

United States. Library of Congress Subject Cataloging Division. (1979). Classification. Class B, Subclasses B-BJ: Philosophy, Psychology (3rd ed.). The Library.

Chicago Style (17th ed.) Citation

United States. Library of Congress Subject Cataloging Division. Classification. Class B, Subclasses B-BJ: Philosophy, Psychology. 3rd ed. Washington: The Library, 1979.

MLA (9th ed.) Citation

United States. Library of Congress Subject Cataloging Division. Classification. Class B, Subclasses B-BJ: Philosophy, Psychology. 3rd ed. The Library, 1979.