Gunawan, and Kana Hidayati. “IRT Method for Measuring The Quality of High School Mathematics Mid-Semester Assessment Questions in Magelang”. Hipotenusa: Journal of Mathematical Society 6, no. 2 (December 19, 2024): 252–265. Accessed January 15, 2025. https://ejournal.uinsalatiga.ac.id/index.php/hipotenusa/article/view/2036.