Prabowo, Anggit, Puspa Puspa, and Fariz Setyawan. “Development of Test Instruments to Measure High Level Thinking Ability of Two Linear Variable Equations System”. International Journal on Education Insight 1, no. 2 (March 26, 2021): 91–100. Accessed February 19, 2026. http://journal2.uad.ac.id/index.php/ijei/article/view/3540.