(1997). Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service.
Chicago Style aipamenaLibrary of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1997.
MLA aipamenaLibrary of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.