Saragih, F.S Masriani, Darmawang Darmawang, and Marwanting Marwanting. “Meningkatkan Prestasi Belajar Ilmu Pengetahuan Sosial Melalui Problem Based Learning Di SMPS Parulian 3 Medan Sumatera Utara”. JURNAL PEMIKIRAN DAN PENGEMBANGAN PEMBELAJARAN 4, no. 1 (April 30, 2022): 317-324. Accessed June 21, 2025. https://ejournal-jp3.com/index.php/Pendidikan/article/view/227.