Risalah, Dewi, Norelia Novi, and Buchari. “Powtoon-Based Animated Video for Spatial Visualisation in Plane Geometry: A Preliminary Study”. International Journal of Teaching 3, no. 3 (September 2, 2026): 134–141. Accessed October 28, 2026. https://www.ccg-edu.org/index.php/ijt/article/view/1239.