Mulyadi, Eko, and Warnoto Warnoto. “IMPROVING LEARNING MOTIVATION AND STUDENT PHYSICS LEARNING OUTCOMES THROUGH THE GROUP INVESTIGATION LEARNING MODEL”. Ideguru: Jurnal Karya Ilmiah Guru 5, no. 2 (November 2, 2020): 39 -. Accessed April 16, 2024. https://jurnal-dikpora.jogjaprov.go.id/index.php/jurnalideguru/article/view/125.