Analisis Keaktifan Siswa dalam Pembelajaran IPAS Melalui Problem Based Learning (PBL) di Kelas IV SD Negeri 091339 Dolog Huluan. (2026). Universum: Journal of Holistic and Multidisciplinary Perspectives, 1(1), 7-15. https://publicpublication.biz.id/ojs/index.php/universum/article/view/2