APA Style

Pratama, I, P, A, E. (2019). Customer Relationship Management (CRM) : Teori dan Praktek Berbasis Open Source . Bandung: Informatika.

MLA Style

Pratama, I, Putu, Agus, Eka. "Customer Relationship Management (CRM) : Teori dan Praktek Berbasis Open Source". Bandung: Informatika, 2019. Buku Teks.