Gaya APA

Zeithaml, V, A. et al (2018). Services Marketing : Integrating Customer Focus Across The Firm 7th Ed (7th Ed). New York: McGraw-Hill Higher Education.

Gaya MLA

Zeithaml, Valarie, A.. et al. "Services Marketing : Integrating Customer Focus Across The Firm 7th Ed". 7th Ed New York: McGraw-Hill Higher Education, 2018. Text.