Nasution, S. H. “Efforts to Improve Student Learning Outcomes in Islamic Education Learning through the Group Investigation Method at SD Negeri 101028 Turunan”. Jurnal Pendidikan Profesi Guru, vol. 1, no. 2, July 2023, pp. 104-10, https://journal.ar-raniry.ac.id/ppg/article/view/6707.