Lestari D, Friansah D, Egok AS. Pengembangan LKS Matematika Berbasis Problem Based Learning untuk Siswa Sekolah Dasar. basicedu [Internet]. 2021 Jul. 15 [cited 2024 Jul. 22];5(4):2231-40. Available from: https://jbasic.org/index.php/basicedu/article/view/1164