Coşkun, K., A. Şahan, and A. K. Erman. “The Effect of the State Anxiety Level on Tennis Exam Performance in University Students”. Journal of Human Sciences, vol. 8, no. 1, Mar. 2011, pp. 1121-30, https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/1606.