Dyfyniad APA

American Library Association. (1980). Handbook of organization 1980-1981 and membership directory. ALA.

Dyfyniad Arddull Chicago

American Library Association. Handbook of Organization 1980-1981 and Membership Directory. Chicago: ALA, 1980.

Dyfyniad MLA

American Library Association. Handbook of Organization 1980-1981 and Membership Directory. ALA, 1980.

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