APA (7th ed.) Citation

Library of Congress, C. P. a. S. O. Library of Congress classification. H. Social sciences. Library of congress.

Chicago Style (17th ed.) Citation

Library of Congress, Cataloging Policy and Support Office. Library of Congress Classification. H. Social Sciences. Washington, D. C: Library of congress.

MLA (9th ed.) Citation

Library of Congress, Cataloging Policy and Support Office. Library of Congress Classification. H. Social Sciences. Library of congress.