Cita APA

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

Citación estilo Chicago

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

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