Rambe, Nurainun, et al. “Improving the Learning Outcomes of Islamic Religious Education Students With the Problem Based Learning Model at SD Negeri 27 Kotapinang”. KOGNITIF: Jurnal Ilmiah Pendidikan Dan Keguruan, vol. 1, no. 1, June 2024, pp. 149-56, https://journal.mgedukasia.or.id/index.php/kognitif/article/view/337.