Mertayasmini, Made. “Peningkatan Prestasi Belajar Matematika Dengan Model Problem Based Learning”. Indonesian Journal of Instruction 4, no. 2 (Mei 1, 2023): 51–56. Diakses Mei 17, 2024. https://ejournal.undiksha.ac.id/index.php/IJI/article/view/60397.