Zeithaml, V. A. (2006). Services marketing: Integrating customer focus across the firm. Boston: McGraw-Hill/Irwin.
Παραπομπή Chicago StyleZeithaml, Valarie A. Services Marketing: Integrating Customer Focus Across the Firm. Boston: McGraw-Hill/Irwin, 2006.
Παραπομπή MLAZeithaml, Valarie A. Services Marketing: Integrating Customer Focus Across the Firm. Boston: McGraw-Hill/Irwin, 2006.
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