AYYAD, Donya Abdel-Aziz. The Role of E-Management in Improving the Crowd Management from the Perspective of the Employees in the Hajj and Umrah System. Journal of Economic, Administrative and Legal Sciences, New Mexico, United States, v. 6, n. 6, p. 116–148, 2022. DOI: 10.26389/AJSRP.N140721. Disponível em: https://www.ajsrp.ojsexpert.com/index.php/jeals/article/view/4760. Acesso em: 20 dec. 2025.