Ambarwati, Tutik. “PENINGKATAN MOTIVASI, KEDISIPLINAN, DAN PRESTASI BELAJAR IPS SISWA MELALUI METODE GROUP INVESTIGASI”. JIPSINDO 6, no. 1 (March 30, 2019): 87–111. Accessed July 31, 2025. https://journal.uny.ac.id/index.php/jipsindo/article/view/24334.