Donuk, B., S. Şahin, and F. Yamaner. “The Examination of Sport Managers and coaches’ Stress Levels and Depressed Mood at Work in Turkey”. Journal of Human Sciences, vol. 10, no. 1, Apr. 2013, pp. 1116-27, https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/2581.