Gaya APA

Pratama, I, P, A, E. (2020). Customer Relationship Management ( CRM ) (Cet.1). Bandung: informatika Bandung.

Gaya MLA

Pratama, I, Putu, Agus, Eka. "Customer Relationship Management ( CRM )". Cet.1 Bandung: informatika Bandung, 2020. Text.