., Ekawarna, Ahmad Nasori, and Riyo Riyadi. “The Effectiveness of Android-Based Learning Media With Appy Pie Toward Indonesian Economics Subject”. International Journal of Engineering and Technology 7, no. 3.30 (August 24, 2018): 287–288. Accessed April 28, 2025. https://sciencepubco.com/index.php/IJET/article/view/18263.