Ritonga, Iskandar. “Non Performing Financing Dan Dana Pihak Ketiga: Pengaruhnya Terhadap Laba Bank Syariah Di Indonesia”. Proceedings of Annual Conference for Muslim Scholars 3, no. 1 (November 26, 2019): 1010-1017. Accessed October 21, 2021. http://proceedings.kopertais4.or.id/index.php/ancoms/article/view/290.