Gaya APA
Lovelock, C., Wirtz, J. (2007).
Services marketing : People, Technology, Strategy .
Canada:
Pearson Prentice Hall=.
Gaya MLA
Lovelock, Christoper., Wirtz, Jochen.
"Services marketing : People, Technology, Strategy".
Canada:
Pearson Prentice Hall=,
2007.
Text.