PURBA, Nildahayani; LUBIS, Suheri. Efforts to Improve Students’ Learning Outcomes Using the Problem Based Learning Method in Islamic Education at SD Negeri 081228 Sibolga. KOGNITIF: Jurnal Ilmiah Pendidikan dan Keguruan, [S. l.], v. 1, n. 1, p. 165–171, 2024. Disponível em: https://journal.mgedukasia.or.id/index.php/kognitif/article/view/339. Acesso em: 27 jun. 2025.