Gaya APA
Kasmir, .
(2017).
Customer Services Excellent: Teori dan Praktik
(
ed. 1. cet. 1)
.
Jakarta:
Rajawali Pers.
Gaya MLA
Kasmir, .
"Customer Services Excellent: Teori dan Praktik".
ed. 1. cet. 1
Jakarta:
Rajawali Pers,
2017.
Buku.