PURWANTO, H.; ISWAHYUDI, A. F.; PIROUS, H.; INDRAWATI, D. Penerapan Sistem Informasi Electronic Costumer Relationship Management. INTERNAL (Information System Journal), [S. l.], v. 4, n. 2, p. 113–122, 2021. DOI: 10.32627/internal.v4i2.401. Disponível em: https://jurnal.masoemuniversity.ac.id/index.php/internal/article/view/401. Acesso em: 16 apr. 2026.