“ANALISA KEPUASAN PELANGGAN PADA PELAYANAN DAN TARIF KARTU SELULER MENTARI PUNYA INDOSAT”, jopt, vol. 5, no. 2, pp. 145–158, Feb. 2018, Accessed: Oct. 04, 2026. Available: https://jurnal.stieieu.ac.id/index.php/opt/article/view/56