RAHAYU, Filania; IRAWAN, Hendri. PERANCANGAN SISTEM ELECTRONIC CUSTOMER RELATIONSHIP MANAGEMENT (E-CRM) GUNA MEMBANTU MENINGKATKAN PELAYANAN DAN LOYALITAS PELANGGAN STUDI KASUS: LEMBAGA PENDIDIKAN KUMON. IDEALIS : InDonEsiA journaL Information System, [S. l.], v. 2, n. 4, p. 205–212, 2018. Disponível em: https://jom.fti.budiluhur.ac.id/index.php/IDEALIS/article/view/1351. Acesso em: 14 feb. 2025.