Cita APA

(2006). Library of congress Subject Headings. Washington, D.C: Library of Congress.

Chicago Style Citation

Library of Congress Subject Headings. Washington, D.C: Library of Congress, 2006.

Cita MLA

Library of Congress Subject Headings. Washington, D.C: Library of Congress, 2006.

Atenció: Aquestes cites poden no estar 100% correctes.