Hestiani, D., and N. Hasanuh. “Comparison of Return on Assets Ratio and Non-Performing Loans Between Conventional Banks and Sharia Banks (Study at PT. Bank BTPN Tbk and PT. Bank BTPN Syariah Tbk)”. Jurnal Ilmiah Wahana Pendidikan, Vol. 9, no. 23, Dec. 2023, pp. 210-8, https://jurnal.peneliti.net/index.php/JIWP/article/view/5668.