Dyfyniad APA

(1955). National Formulary (10th.). American Pharmaceutical Association.

Dyfyniad Arddull Chicago

National Formulary. 10th. Washington: American Pharmaceutical Association, 1955.

Dyfyniad MLA

National Formulary. 10th. American Pharmaceutical Association, 1955.

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