Singh, U., & Dewan, J. (1996). Sales management. Commonwealth.
Dyfyniad Arddull ChicagoSingh, U.K, and J.M Dewan. Sales Management. New Delhi: Commonwealth, 1996.
Dyfyniad MLASingh, U.K, and J.M Dewan. Sales Management. Commonwealth, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.