Aliyu, Sirajo, and Rosylin Mohd Yusof. “Profitability and Cost Efficiency of Islamic Banks: A Panel Analysis of Some Selected Countries”. International Journal of Economics and Financial Issues 6, no. 4 (October 21, 2016): 1736–1743. Accessed April 26, 2024. https://econjournals.com/index.php/ijefi/article/view/2799.