Lestari F, Egok AS, Febriandi R. Pengembangan Bahan Ajar Matematika Berbasis Problem Based Learning Pada Siswa Sekolah Dasar. basicedu [Internet]. 2021 Jan. 4 [cited 2024 Jul. 3];5(1):394-405. Available from: https://jbasic.org/index.php/basicedu/article/view/628