Umar, Nurwahidah, Evi Ristiana, and Rosleny Babo. “The Effect of Problem-Based Learning on Concept Mastery and Scientific Attitudes of Fifth Grade Students”. Edumaspul: Jurnal Pendidikan 7, no. 2 (October 1, 2023). Accessed April 5, 2026. https://jurnal.unimen.cloud/index.php/maspuljr/article/view/5908.