Devirita F, Neviyarni N, Daharnis D. Pengembangan Buku Ajar Berbasis Problem Based Learning di Sekolah Dasar. basicedu [Internet]. 2021 Jan. 15 [cited 2026 Apr. 26];5(2):469-78. Available from: https://www.jbasic.org/index.php/basicedu/article/view/680