Gaya APA

Wirtz, J., Lovelock, C, H. (2022). Services marketing: people, technology, strategy 9th (9th ed). Hackensack, NJ: World Scientific, c.

Gaya MLA

Wirtz, Jochen., Lovelock, Christopher, H.. "Services marketing: people, technology, strategy 9th". 9th ed Hackensack, NJ: World Scientific, c, 2022. Buku Wajib.