SIMATUPANG , N.; NASUTION, M. I.; HARIANTO. Application of Problem-Based Learning Model to Improve Student Learning Outcomes at SD Negeri 081239 Sibolga. Jurnal Pendidikan Profesi Guru, [S. l.], v. 1, n. 1, p. 130–137, 2023. DOI: 10.22373/jppg.v1i1.6769. Disponível em: https://journal.ar-raniry.ac.id/ppg/article/view/6769. Acesso em: 28 apr. 2025.