Malik, Ali. “A Comparative Study of the Level of Concern for the Short Distance Swimmers and Middle Distance Swimmers (freestyle) and Their Relationship to Achievement”. Journal of Physical Education 20, no. 3 (September 28, 2008): 243–261. Accessed May 9, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/792.