Abdallah, Khalid, and Jehad Mahmoud. “The Degree of Bullying Among Participants and Non-Participants in Sports Activities”. Journal of Physical Education 32, no. 4 (December 28, 2020): 54–65. Accessed May 4, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1040.