Britt, S. H., & Guess F. Norman. (1983). The dartnell marketing manager's handbook (2nd ed.). UBS.
Dyfyniad Arddull ChicagoBritt, Steuart Henderson, and Guess F. Norman. The Dartnell Marketing Manager's Handbook. 2nd ed. New Delhi: UBS, 1983.
Dyfyniad MLABritt, Steuart Henderson, and Guess F. Norman. The Dartnell Marketing Manager's Handbook. 2nd ed. UBS, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.