एपीए उद्धरण

(2006). Library of Congress subject headings. Wash., D.C: Libr. of Congress, Cataloging Distribution Service.

शिकागो स्टाइल उद्धरण

Library of Congress Subject Headings. Wash., D.C: Libr. of Congress, Cataloging Distribution Service, 2006.

एमएलए उद्धरण

Library of Congress Subject Headings. Wash., D.C: Libr. of Congress, Cataloging Distribution Service, 2006.