BASOKCU, T. Oguz, and Simge CEYLAN. “GENERATION STUDY OF PISA MATHS PROFICIENCY LEVELS IN TURKISH 6TH GRADE STUDENTS”. The Eurasia Proceedings of Educational and Social Sciences 6 (August 4, 2017): 14–23. Accessed December 24, 2024. https://epess.net/index.php/epess/article/view/309.