Dyfyniad APA

American Library Association. American Libraries. Chicago: American Library Association.

Dyfyniad Arddull Chicago

American Library Association. American Libraries. Chicago: American Library Association.

Dyfyniad MLA

American Library Association. American Libraries. Chicago: American Library Association.

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