Islamiati, Nur, Dina Amalya Lapele, and Beatrix Purnama Sari. “Mathematical Problem Solving Ability in Terms of Mathematical Disposition on the Application of Group Investigation (GI) Learning Models”. Edumatica : Jurnal Pendidikan Matematika 11, no. 02 (August 30, 2021): 29-37. Accessed July 22, 2024. https://online-journal.unja.ac.id/edumatica/article/view/12205.