Murtiastuti, Kun. “Efektivitas Group Investigation Terhadap Kemandirian, Penalaran, Dan Self-Efficacy Matematika Peserta Didik”. Jurnal Pendidikan Tambusai 8, no. 3 (December 28, 2024): 50892–50897. Accessed July 16, 2025. https://jptam.org/index.php/jptam/article/view/23925.