APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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