Al- Rifaai, A.H.M, and Obada Samee Ghadban. 2019. “Study The Of The Effect Of Non-Performing Loans On The Efficiency Of Banking Profits (An Applied Study On Traditional Syrian Private Banks)”. Tishreen University Journal- Economic and Legal Sciences Series 41 (6). https://journal.tishreen.edu.sy/index.php/econlaw/article/view/9303.