Putra, Harry Dwi, Tatang Herman, and Utari Sumarmo. “Development of Student Worksheets to Improve the Ability of Mathematical Problem Posing”. International Journal on Emerging Mathematics Education 1, no. 1 (February 16, 2017): 1–10. Accessed November 4, 2024. https://journal.uad.ac.id/index.php/IJEME/article/view/5507.