Demirel, Mehmet, Duygu Harmandar Demirel, and Emrah Serdar. “Constraints and Perceived Freedom Levels ın the Leisure of University Students”. Journal of Human Sciences 14, no. 1 (March 24, 2017): 789–795. Accessed May 4, 2024. https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/4340.