Gaya APA

Zeithaml, V, A., D., I, B, M, J, I, G, D. (2009). Services marketing: integrating customer focus across the firm . Boston: .

Gaya MLA

Zeithaml, Valarie, A.., D., I., Bitner,, Mary, Jo, II., Gremler,, Dwayne. "Services marketing: integrating customer focus across the firm". Boston: , 2009. .