Yaldi, Novri, and Ermawita Ermawita. “Pengembangan Perangkat Pembelajaran Berbasis Pendekatan Problem Based Learning Di Sekolah Dasar”. Jurnal Basicedu 5, no. 1 (November 17, 2020): 133–139. Accessed July 22, 2024. https://jbasic.org/index.php/basicedu/article/view/568.