Koyuncu, Mahmut Sami, and Ayşenur ERDEMİR. “Comparison of International TIMSS 2011 Proficiency Levels and Cut-off Scores Set by Using Cluster Analysis”. International Journal of Contemporary Educational Research 6, no. 1 (October 30, 2022): 155–168. Accessed April 20, 2024. https://ijcer.net/index.php/pub/article/view/73.