Ahmed, Iftikhar. “The Effect Of Using Differentiated Instruction On Learning Breaststroke In Female Students College of Physical Education and Sport Sciences”. Journal of Physical Education 28, no. 4.1 (December 28, 2016): 167–180. Accessed May 4, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/439.