Cita APA (7a ed.)

Gale Research Company & United States. Library of Congress. Subject Cataloging Division. (1981). Classification. Class H. Subclasses H-HJ. Social sciences. Economics (4th ed.). Library of Congresss.

Cita Chicago Style (17a ed.)

Gale Research Company y United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses H-HJ. Social Sciences. Economics. 4th ed. Washington: Library of Congresss, 1981.

Cita MLA (9a ed.)

Gale Research Company y United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses H-HJ. Social Sciences. Economics. 4th ed. Library of Congresss, 1981.