Analisis Kepuasan Pelanggan PDAM Tirta Umbu Kabupaten Nias. E-BISNIS: JURNAL ILMIAH EKONOMI DAN BISNIS, [S. l.], v. 13, n. 1, p. 17–25, 2020. DOI: 10.51903/e-bisnis.v13i1.149. Disponível em: https://journal.stekom.ac.id/index.php/Bisnis/article/view/149. Acesso em: 6 jun. 2026.