Gaya APA
Rangkuti, F. (2013).
CUSTOMER SERVICE SATISFACTION & CALL CENTER BERDASARKAN ISO 9001 .
Jakarta:
Pt Gramedia Pustaka Utama.
Gaya MLA
Rangkuti, Freddy.
"CUSTOMER SERVICE SATISFACTION & CALL CENTER BERDASARKAN ISO 9001".
Jakarta:
Pt Gramedia Pustaka Utama,
2013.
Buku Teks.