Patimah, Siti, et al. “PENINGKATAN PROSES DAN HASIL BELAJAR IPA MELALUI MODEL PROBLEM BASED LEARNING SISWA SEKOLAH DASAR”. Jurnal Muara Pendidikan, vol. 8, no. 2, Dec. 2023, pp. 393-9, https://ejournal.ummuba.ac.id/index.php/mp/article/view/1499.