Nurdin, Nurdin. “Increasing Population Knowledge: The Comparation of Problem Solving Learning Methods With Conventional Methods”. Jurnal Pendidikan dan Pengajaran 54, no. 2 (July 17, 2021): 380–389. Accessed February 23, 2025. https://ejournal.undiksha.ac.id/index.php/JPP/article/view/35778.