APA Style
Wirtz, J., Lovelock, C. (2016).
Services Marketing : Manusia, Teknologi, Strategi .
Jakarta:
Gramedia Pustaka Utama.
MLA Style
Wirtz, Jochen., Lovelock, Christoper.
"Services Marketing : Manusia, Teknologi, Strategi".
Jakarta:
Gramedia Pustaka Utama,
2016.
Text.