Dawson, K. (2001). call center handbook (4th ed.). CMP books.
Dyfyniad Arddull ChicagoDawson, Keith. Call Center Handbook. 4th ed. New York: CMP books, 2001.
Dyfyniad MLADawson, Keith. Call Center Handbook. 4th ed. CMP books, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.