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