Verawati, Anisa, Denik Agustito, Widowati Pusporini, Wikan Utami, and Sri Widodo. “Designing Android Learning Media to Improve Problem-Solving Skills of Ratio”. Advances in Mobile Learning Educational Research 2, no. 1 (January 19, 2022): 216-224. Accessed December 21, 2024. https://www.syncsci.com/journal/AMLER/article/view/AMLER.2022.01.005.