APA

Zeithaml V. A., Bitner M. J. & Gremler D. D. (2009). Services Marketing. NewYork: McGraw-Hill.

Chicago

Zeithaml Valarie A, Bitner Mary Jo and Gremler Dwayne D. 2009. Services Marketing. NewYork: McGraw-Hill.

Harvard

Zeithaml V. A., Bitner M. J. and Gremler D. D. (2009). Services Marketing. NewYork: McGraw-Hill.

MLA

Zeithaml Valarie A, Bitner Mary Jo and Gremler Dwayne D. Services Marketing. NewYork: McGraw-Hill. 2009.