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.
Chicago-Zitierstil (17. Ausg.)Gale Research Company und United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses H-HJ. Social Sciences. Economics. 4th ed. Washington: Library of Congresss, 1981.
MLA-Zitierstil (9. Ausg.)Gale Research Company und United States. Library of Congress. Subject Cataloging Division. Classification. Class H. Subclasses H-HJ. Social Sciences. Economics. 4th ed. Library of Congresss, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.