एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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