Yousef, E. ., M. . Kayed, and Z. . Irmaily. “The Impact of Participation of Palestinian Players Inside Palestinian Professional Football League on the Cohesion of the Team from the Point of View of Technical Staff”. Dirasat: Educational Sciences, vol. 47, no. 2, June 2020, pp. 48-59, http://dsr.ju.edu.jo/djournals/index.php/Edu/article/view/2270.