Gaya APA
Pratama, I, P, A, E. (2019).
Customer Relationship Management (CRM) : Teori dan Praktek Berbasis Open Source .
Bandung:
Informatika.
Gaya MLA
Pratama, I, Putu, Agus, Eka.
"Customer Relationship Management (CRM) : Teori dan Praktek Berbasis Open Source".
Bandung:
Informatika,
2019.
Text.