Sidik, Tri Wijaya, Wina Witanti, & Fajri Rakhmat Umbara. " Pembangunan Sistem Electronic Customer Relationship Management (E-CRM) pada PT. Sapta Satria Jaya." JUMANJI (Jurnal Masyarakat Informatika Unjani) [Online], 2.1 (2018): 71-80. Web. 12 Jul. 2020