Cita APA

(1997). Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service.

Citación estilo Chicago

Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1997.

Cita MLA

Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1997.