Suriadi, Nurlaili, and R. Purba. “Improving Student Learning Outcomes through Problem Based Learning Model in Islamic Education Learning at SD Ngeri 14 Kotapinang”. Jurnal Pendidikan Profesi Guru, vol. 1, no. 1, Feb. 2023, pp. 158-66, https://journal.ar-raniry.ac.id/ppg/article/view/6658.