Nurhidayah, Nurhidayah, and Rahayu Sri Waskitoningtyas. “Implementation of Problem-Based Learning Models to Improve Understanding of Mathematics Concepts at Al-Hassan High School”. Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika 9, no. 1 (May 31, 2023): 76-88. Accessed November 24, 2024. https://ojs.unpkediri.ac.id/index.php/matematika/article/view/19544.