Irons, K. (1997). The world of superservice: Creating profit through a passion for customer service. Harlow: Addison-Wesley.
Čikaški stil citiranjaIrons, Ken. The World of Superservice: Creating Profit Through a Passion for Customer Service. Harlow: Addison-Wesley, 1997.
MLA način citiranjaIrons, Ken. The World of Superservice: Creating Profit Through a Passion for Customer Service. Harlow: Addison-Wesley, 1997.
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