Cita APA (7th ed.)

Library of Congress & Subjet Cataloging Division. (2007). Subject Headings (30th. ed.). The National Bibliographic Service.

Cita Chicago (17th ed.)

Library of Congress i Subjet Cataloging Division. Subject Headings. 30th. ed. Washington: The National Bibliographic Service, 2007.

Cita MLA (9th ed.)

Library of Congress i Subjet Cataloging Division. Subject Headings. 30th. ed. The National Bibliographic Service, 2007.