Gaol, Gabe Pangeran Lumban, et al. “Pengaruh Model Pembelajaran Problem Based Learning Terhadap Hasil Belajar IPAS Siswa Kelas IV SD Negeri 091273 Karang Bangun Pematangsiantar ”. Innovative: Journal Of Social Science Research, vol. 5, no. 4, Aug. 2025, pp. 11160-74, doi:10.31004/innovative.v5i4.21168.