Amelia MS, Masniladevi M. Peningkatan Hasil Belajar Matematika Menggunakan Model Problem Based Learning (PBL) di Kelas IV Sekolah Dasar. jptam [Internet]. 2020 Oct. 11 [cited 2024 Nov. 23];4(3):1912-7. Available from: http://jptam.org/index.php/jptam/article/view/665