Gaya APA
Rangkuni, F. (2013).
Customer Service Satisfaction Center Berdasarkan ISO 9001 .
Jakarta:
PT Gramedia Pustaka Utama.
Gaya MLA
Rangkuni, Freddy.
"Customer Service Satisfaction Center Berdasarkan ISO 9001".
Jakarta:
PT Gramedia Pustaka Utama,
2013.
Text.