Dyfyniad APA

American Library Association. Bulletin of the American Library Association. [American Library Association].

Dyfyniad Arddull Chicago

American Library Association. Bulletin of the American Library Association. [Chicago]: [American Library Association].

Dyfyniad MLA

American Library Association. Bulletin of the American Library Association. [American Library Association].

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