Ridhwan, Ridhwan, Sumarmi Sumarmi, I Nyoman Ruja, Dwiyono Hari Utomo, and Rima Meilita Sari. “Measuring Students Environmental Problem Solving Ability Across Gender and School Differences Using Paper Based Testing”. International Journal of Emerging Technologies in Learning (iJET) 15, no. 13 (July 10, 2020): pp. 303–320. Accessed November 25, 2024. https://online-journals.org/index.php/i-jet/article/view/11709.