United States Library of Congress. (1995). Subject headings (18th ed.). Library of Congress, Cataloging Distribution Service.
Chicago-referens (17:e uppl.)United States Library of Congress. Subject Headings. 18th ed. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1995.
MLA-referens (9:e uppl.)United States Library of Congress. Subject Headings. 18th ed. Library of Congress, Cataloging Distribution Service, 1995.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.