Hamed Kazem Hamad Al-Khafaji (2019) “The Effect of Differentiated Learning Method Learning to Collaborate in Learning Some Skills of Football And keep them ”, Modern Sport, 18(3), pp. 367–376. Available at: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1599 (Accessed: 10 May 2025).