Saragih FM, Darmawang D, Marwanting M. Meningkatkan Prestasi Belajar Ilmu Pengetahuan Sosial Melalui Problem Based Learning di SMPS Parulian 3 Medan Sumatera Utara. JP3 [Internet]. 2022Apr.30 [cited 2025Jun.21];4(1):317-24. Available from: https://ejournal-jp3.com/index.php/Pendidikan/article/view/227