Zeithaml, V. A., Bitner, M. J., & Gremler, D. D. (2006). Services marketing: Integrating customer focus across the firm (4th ed.). Boston: McGraw-Hill/Irwin.
استشهاد بنمط شيكاغوZeithaml, Valarie A., Mary Jo Bitner, و Dwayne D. Gremler. Services Marketing: Integrating Customer Focus Across the Firm. 4th ed. Boston: McGraw-Hill/Irwin, 2006.
MLA استشهادZeithaml, Valarie A., Mary Jo Bitner, و Dwayne D. Gremler. Services Marketing: Integrating Customer Focus Across the Firm. 4th ed. Boston: McGraw-Hill/Irwin, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.