Al-Harbi, Ahmad. “Banks’ Profitability in an Islamized Financial System: Comparative Study Between Iran and Sudan”. International Journal of Islamic Banking and Finance Research 4, no. 1 (March 5, 2020): 8-14. Accessed July 10, 2020. https://www.cribfb.com/journal/index.php/ijibfr/article/view/498.