Izzaroh, Iftitakhul, Sunyoto Hadi Prajitno, Susilo Hadi, and Lydia Lia Prayitno. “Implications of Problem Based Learning Model on Students’ Critical Thinking Ability in Arithmetic Sequence”. Journal of Education and Learning Mathematics Research (JELMaR) 6, no. 1 (May 21, 2025): 55–59. Accessed June 4, 2026. https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/19.