Gaya APA
MM, D, K, S. (2018).
Customer Services Exellent (Teori dan Praktik) (Ed. 1 Cet. 2).
Depok:
Rajawali Press.
Gaya MLA
MM, Dr., Kasmir,, SE.,.
"Customer Services Exellent (Teori dan Praktik)".
Ed. 1 Cet. 2
Depok:
Rajawali Press,
2018.
Buku Teks.