Gaya APA
Lovelock, C., Wirtz, J. (2011).
Services Marketing: people, Technology, Strategy (ed. 7).
England:
Pearson Education Limited.
Gaya MLA
Lovelock, Christopher., Wirtz, Jochen.
"Services Marketing: people, Technology, Strategy".
ed. 7
England:
Pearson Education Limited,
2011.
BUKU.