PAYNE, S. (1999). Delivering costumer service: How to win a competitiveedge through managing customer relationships.. Grolier International.
Lua i Stíl Chicago (17ú heag.)PAYNE, Shelia. Delivering Costumer Service: How to Win a Competitiveedge Through Managing Customer Relationships.. Hongkong: Grolier International, 1999.
Lua MLA (9ú heag.)PAYNE, Shelia. Delivering Costumer Service: How to Win a Competitiveedge Through Managing Customer Relationships.. Grolier International, 1999.
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