Zeithaml, V. A., Bitner, M. J., & Gremler, D. D. (2006). Services marketing: Integrating customer focus across the firm (4th ed.). Boston: McGraw-Hill/Irwin.
Παραπομπή Chicago StyleZeithaml, Valarie A., Mary Jo Bitner, και Dwayne D. Gremler. Services Marketing: Integrating Customer Focus Across the Firm. 4th ed. Boston: McGraw-Hill/Irwin, 2006.
Παραπομπή MLAZeithaml, Valarie A., Mary Jo Bitner, και Dwayne D. Gremler. Services Marketing: Integrating Customer Focus Across the Firm. 4th ed. Boston: McGraw-Hill/Irwin, 2006.
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