LAGUT HARAHAP. Improving Student Learning Outcomes Using the Problem-Based Learning Model in Grade 4 at SDN 1105 Aek Bonban. Jurnal Profesionalisme Guru, [S. l.], v. 1, n. 1, p. 40–44, 2025. Disponível em: https://journal.maalahliyah.sch.id/index.php/jpg/article/view/150. Acesso em: 10 mar. 2026.