Citazione Stile APA (7a Edizione)

Gale Research Company & United States. Library of Congress. Subject Cataloging Division. (1980). Classification. Class H. Subclasses HM-HX. Social sciences. Sociology (4th ed.). Library of Congress.

Citazione stile Chigago Style (17a edizione)

Gale Research Company e United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses HM-HX. Social Sciences. Sociology. 4th ed. Washington: Library of Congress, 1980.

Citatione MLA (9a ed.)

Gale Research Company e United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses HM-HX. Social Sciences. Sociology. 4th ed. Library of Congress, 1980.