Biantara, Dewa Nyoman Alit. “MENINGKATKAN PRESTASI BELAJAR MATEMATIKA MELALUI PENGGUNAAN MODEL PEMBELAJARAN PROBLEM SOLVING”. Journal of Education Action Research 4, no. 2 (May 25, 2020): 171–177. Accessed April 24, 2024. https://ejournal.undiksha.ac.id/index.php/JEAR/article/view/25003.