Gaya APA

Zeithaml, V, A. et al (2013). Services Marketing: Integrating Customer Focus Across The Firm (Sixth Edition). Singapore: McGraw-Hill Education (Asia).

Gaya MLA

Zeithaml, Valerie, A.. et al. "Services Marketing: Integrating Customer Focus Across The Firm". Sixth Edition Singapore: McGraw-Hill Education (Asia), 2013. Text.