Purba, R., Lismayuni, and Suriadi. “Implementation of Problem Based Learning to Improve Student Learning Outcomes in Islamic Education Learning at SDN 105449 Gunung Pamela”. Jurnal Pendidikan Profesi Guru, vol. 1, no. 2, July 2023, pp. 146-52, https://journal.ar-raniry.ac.id/ppg/article/view/6714.