عبد الله السبئيصادق. “Measure the Quality of Islamic Banking Customer Perspective, Empirical Study on Some Islamic Banks Arabia”. Journal of Economics and Administrative Sciences 23, no. 97 (June 1, 2017): 174. Accessed August 18, 2021. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/305.