APA (7th ed.) Citation

Library of Congress. Subject Cataloging Division & Library of Congress. Classification Division. (1978). LC classification outline (4th ed.). Library of Congress.

Chicago Style (17th ed.) Citation

Library of Congress. Subject Cataloging Division and Library of Congress. Classification Division. LC Classification Outline. 4th ed. Washington: Library of Congress, 1978.

MLA (9th ed.) Citation

Library of Congress. Subject Cataloging Division and Library of Congress. Classification Division. LC Classification Outline. 4th ed. Library of Congress, 1978.