Putra, Randi, Ahmad Fauzan, and Mhmd Habibi. “The Impact of Cognitive Conflict Based Learning Tools on Students` Mathematical Problem Solving Ability”. International Journal of Educational Dynamics 2, no. 1 (January 17, 2020): 209-218. Accessed May 13, 2024. http://ijeds.ppj.unp.ac.id/index.php/IJEDS/article/view/247.