Gaya APA
Psychology of Service. (2004).
Yogyakarta:
Graha Ilmu.
Gaya Chicago
Psychology of Service.
1.
Yogyakarta:
Graha Ilmu,
2004.
Text.
Gaya MLA
Psychology of Service.
1.
Yogyakarta:
Graha Ilmu,
2004.
Text.
Gaya Turabian
Psychology of Service.
Yogyakarta:
Graha Ilmu,
2004.
Print.