Suyatinah, Suyatinah. “Increasing Motivation and Learning Outcomes of Geography through Cooperative Learning Model Type Group Investigation”. Ideguru: Jurnal Karya Ilmiah Guru 6, no. 3 (September 1, 2021): 280-287. Accessed June 22, 2024. https://jurnal-dikpora.jogjaprov.go.id/index.php/jurnalideguru/article/view/259.