AZIZI, S.; SIMANJUNTAK, F.; SIREGAR, P. S. Teachers’ Efforts to Improve Students’ Learning Outcomes in Islamic Education through the Group Investigation Model at SD Negeri 084094 Sibolga. Jurnal Pendidikan Profesi Guru, [S. l.], v. 1, n. 1, p. 112–119, 2023. Disponível em: https://journal.ar-raniry.ac.id/ppg/article/view/6651. Acesso em: 23 feb. 2025.