Ash,MIchael, & Ash, I. (1977). Formulary of Cosemetic Preparations. Chemical Publishing.
Dyfyniad Arddull ChicagoAsh,MIchael, and Irene Ash. Formulary of Cosemetic Preparations. New York: Chemical Publishing, 1977.
Dyfyniad MLAAsh,MIchael, and Irene Ash. Formulary of Cosemetic Preparations. Chemical Publishing, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.