APA Style

Pratama, I, P, A, E. (2019). Customer Relationship Management (CRM) : teori dan praktek berbasis open source . Bandung: Penerbit Informatika.

MLA Style

Pratama, I, Putu, Agus, Eka. "Customer Relationship Management (CRM) : teori dan praktek berbasis open source". Bandung: Penerbit Informatika, 2019. Text.