PEPPERS DON. (2004). MANAGING CUSTOMER RELATIONSHIP. JOHN WILEY AND SONS.
Dyfyniad Arddull ChicagoPEPPERS DON. MANAGING CUSTOMER RELATIONSHIP. NEW JERSEY: JOHN WILEY AND SONS, 2004.
Dyfyniad MLAPEPPERS DON. MANAGING CUSTOMER RELATIONSHIP. JOHN WILEY AND SONS, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.