KARR (Ron) / LOHOWIAK (Don), . (1998). The Complete Idiots Guide to Great Customer service. New Delhi: Prentice Hall of India New Delhi.
KARR (Ron) / LOHOWIAK (Don), . 1998. The Complete Idiots Guide to Great Customer service. New Delhi: Prentice Hall of India New Delhi.
KARR (Ron) / LOHOWIAK (Don), . The Complete Idiots Guide to Great Customer service. New Delhi: Prentice Hall of India New Delhi. 1998.