Julfianto, Muhamad, Elfis Suanto, and Syarifah Nur Siregar. “Developing Problem Based Learning Device to Grow Students’ Mathematical Critical Thinking Ability”. Jurnal Gantang 7, no. 2 (December 28, 2022): 173–184. Accessed December 19, 2024. https://ojs.umrah.ac.id/index.php/gantang/article/view/5318.