Bella Chip R. & Zebke Ron. (2007). Managing Knock Your Socks off Service. American Management Association.
Dyfyniad Arddull ChicagoBella Chip R. and Zebke Ron. Managing Knock Your Socks off Service. NewYork: American Management Association, 2007.
Dyfyniad MLABella Chip R. and Zebke Ron. Managing Knock Your Socks off Service. American Management Association, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.