Muhammad S, H Helmy, Heni Rohaeni, and Wulan Yuliyana. “Pengaruh Harga Dan Kualitas Produk Terhadap Loyalitas Pelanggan Telkomsel ”. Jurnal Sains Manajemen 2, no. 1 (February 18, 2020): 37-44. Accessed April 25, 2024. http://ejurnal.ars.ac.id/index.php/jsm/article/view/187.