Ocak, Mehmet Akif, and Çelebi Uluyol. “Investigation of students’ Intrinsic Motivation in Project Based Learning”. Journal of Human Sciences 7, no. 1 (April 29, 2010): 1152–1169. Accessed April 28, 2024. https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/1222.