Richard, P. K. (1991). Sales and marketing management. Bill Publications.
Dyfyniad Arddull ChicagoRichard, P. Kerii. Sales and Marketing Management. New York: Bill Publications, 1991.
Dyfyniad MLARichard, P. Kerii. Sales and Marketing Management. Bill Publications, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.