Cita APA (7th ed.)

Library of Congress. Policy and Standards Division. (2009). Library of Congress subject headings (31st ed.). Library of Congress, Cataloging Distribution Service.

Cita Chicago (17th ed.)

Library of Congress. Policy and Standards Division. Library of Congress Subject Headings. 31st ed. Washington, D.C: Library of Congress, Cataloging Distribution Service, 2009.

Cita MLA (9th ed.)

Library of Congress. Policy and Standards Division. Library of Congress Subject Headings. 31st ed. Library of Congress, Cataloging Distribution Service, 2009.