Dyfyniad APA

(1998). Library of Congress subject headings. Washington, D.C: Library of Congress, Cataloging Distribution Service.

Dyfyniad Arddull Chicago

Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1998.

Dyfyniad MLA

Library of Congress Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1998.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.