I Ketut Suastika, Sri Hariyani and Nurita Primastya 2024. Open Problem Based Geometry Learning E-Module to Strengthen Creative Thinking Skills. Jurnal Ilmiah Pendidikan Profesi Guru. 7, 3 (Nov. 2024), 590–603. DOI:https://doi.org/10.23887/jippg.v7i3.85173.