Salem Salama, Mohammed Nussari, and Nasser Habtoor. 2019. “CRISIS MANAGEMENT DURING THE REIGN OF THE CALIPH ABU-BAKER AL-SIDIK AND HOW IT CAN BE UTILIZED TO SOLVE CONTEMPORARY ISSUES”. International Journal of Management and Human Science (IJMHS) 3 (4):16-28. https://ejournal.lucp.net/index.php/ijmhs/article/view/963.