Gaya APA

p, K, -. (2018). Customer services excellent : teori dan praktek (Ed.1 Cet.2). depok: Rajawali Pers.

Gaya MLA

p, Kasmir, -. "Customer services excellent : teori dan praktek". Ed.1 Cet.2 depok: Rajawali Pers, 2018. Text.