HASAN, Hasan; PATRIE, Hestya. IMPLEMENTASI ANALISA DAN PERANCANGAN SISTEM DENGAN KONSEP ELECTRONIC CUSTOMER RELATIONSHIP MANAGEMENT (E-CRM) SMPN 245 JAKARTA SELATAN. IDEALIS : InDonEsiA journaL Information System, [S. l.], v. 2, n. 3, p. 157–165, 2019. Disponível em: https://jom.fti.budiluhur.ac.id/IDEALIS/article/view/887. Acesso em: 17 mar. 2026.