Ilahi, Fitratul, Maria Montessori, and Dadan Suryana. “Pendekatan Problem Solving (PBL) Terhadap Hasil Belajar Tematik Pada Siswa Sekolah Dasar”. Jurnal Basicedu 4, no. 4 (August 3, 2020): 969–976. Accessed July 22, 2024. https://jbasic.org/index.php/basicedu/article/view/490.