Gaya APA

KASMIR, . (2017). Customer services excellet : Teori dan prakrik (Ed. 1, Cet. 1). Jakarta: Rajagrafindo Persada.

Gaya MLA

KASMIR, . "Customer services excellet : Teori dan prakrik". Ed. 1, Cet. 1 Jakarta: Rajagrafindo Persada, 2017. Text.