APA aipamena

Library of Congress. (2009). Subject headings. Washington, DC: Library of Congress.

Chicago Style aipamena

Library of Congress. Subject Headings. Washington, DC: Library of Congress, 2009.

MLA aipamena

Library of Congress. Subject Headings. Washington, DC: Library of Congress, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.