Gaya APA

Pratama, I, P, A, E. (2019). Customer Relationship Management (CRM) :Teori dan Praktek Berbasis Open Source (Cet.1). Bandung: BI-Obses.

Gaya MLA

Pratama, I, Putu, Agus, Eka. "Customer Relationship Management (CRM) :Teori dan Praktek Berbasis Open Source". Cet.1 Bandung: BI-Obses, 2019. Text.