APA Style
Rangkuti, F. (2013).
Customer Service Satisfaction & Call Center Berdasarkan ISO 9001 .
Jakarta:
PT Gramedia pustaka utama.
MLA Style
Rangkuti, Freddy.
"Customer Service Satisfaction & Call Center Berdasarkan ISO 9001".
Jakarta:
PT Gramedia pustaka utama,
2013.
Text.