Karam, Thaer. “The Effect of Using Developmental Growth Channels Using Reciprocal Style On Learning and Retaining Some Fundamental Soccer Skills for Second Grade Secondary School Students”. Journal of Physical Education 31, no. 3 (September 28, 2019): 70–78. Accessed June 25, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/861.