Services marketing : integrating customer focus across the firm / Valarie A. Zeithaml ; Mary Jo Bitner ; Dwayne D. Gremler. (1970). New York, NY: McGraw-Hill, c.
Services marketing : integrating customer focus across the firm / Valarie A. Zeithaml ; Mary Jo Bitner ; Dwayne D. Gremler. 5th ed.. New York, NY: McGraw-Hill, c, 1970. Buku Wajib.