Gaya APA

Zeithaml, V, A., Gremler, M, J, B, ;, D, D. (2006). Services Marketing : Integrating customer focus across the firm (Ed.4). Boston: McGraw Hill : Irwin.

Gaya MLA

Zeithaml, Valarie, A.., Gremler, Mary, Jo, Bitner, ;, Dwayne, D.. "Services Marketing : Integrating customer focus across the firm". Ed.4 Boston: McGraw Hill : Irwin, 2006. Text.