Koçak, Ömer, İdris Göksu, and Y. Göktaş. “THE FACTORS AFFECTING ACADEMIC ACHIEVEMENT: A SYSTEMATIC REVIEW OF META ANALYSES”. International Online Journal of Education and Teaching, vol. 8, no. 1, Dec. 2020, pp. 454-8, https://www.iojet.org/index.php/IOJET/article/view/1008.