Ekawati, Aminah, Tatag Yuli Eko Siswono, and Agung Lukito. “Psychometric Analysis of High School Mathematics Ability Test”. Journal of Education Culture and Society 16, no. 1 (June 27, 2025): 503–519. Accessed October 8, 2025. https://www.jecs.pl/index.php/jecs/article/view/1754.