Gaya APA

inc., G, I., Payne, S. (2003). Grolier business library Delivering customer service. How to win a competitive edge through managing customer relationships successfully . : grolier int'l.

Gaya MLA

inc., Grolier, International., Payne, Shelia. "Grolier business library Delivering customer service. How to win a competitive edge through managing customer relationships successfully". : grolier int'l, 2003. Text.