Gaya APA

AL, W, J, E. (2021). SERVICES MARKETING: PEOPLE, TECHNOLOGY, STRATEGY (NINTH EDITION) . : World Scientific Publishing Co.

Gaya MLA

AL, WIRTZ, JOCHEN, ET. "SERVICES MARKETING: PEOPLE, TECHNOLOGY, STRATEGY (NINTH EDITION)". : World Scientific Publishing Co, 2021. S2-Pendidikan Bahasa Arab.