Timm, P. R. (2008). Customer service: Career success through customer loyalty (4th ed.). Pearson.
Čikaški stil citiranja (17. izdanje)Timm, Paul R. Customer Service: Career Success Through Customer Loyalty. 4th ed. Upper Saddle, River, NJ: Pearson, 2008.
MLA način citiranja (9. izdanje)Timm, Paul R. Customer Service: Career Success Through Customer Loyalty. 4th ed. Pearson, 2008.
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