Gaya APA

Zeithaml, V, A., D.Gremler, I, J, B, , , I. (2017). Services Marketing Integrating Ccustomer Focus Across the Firm . S.L: Mc Graw Hill Higher.

Gaya MLA

Zeithaml, Valarie, A.., D.Gremler, I.Mary, Jo, Bitner, , , II.Dwayne. "Services Marketing Integrating Ccustomer Focus Across the Firm". S.L: Mc Graw Hill Higher, 2017. Text.