Wardani, Iffatu, Herman Tolle, and Ismiarta Aknuranda. “Evaluation of an Educational Media on Cube Nets Based on Learning Effectiveness and Gamification Parameters”. International Journal of Emerging Technologies in Learning (iJET) 14, no. 14 (July 24, 2019): pp. 4–18. Accessed January 19, 2022. https://online-journals.org/index.php/i-jet/article/view/10505.