Masrizal, Syaiful Zuhri Harahap, Musthafa Haris Munandar, Irmayanti, and Aisyah Hayati. “Design and Development of Mathematics and Basic Indonesian Learning Tools for Early Children Based on Android”. Jurnal Mantik 4, no. 3 (November 1, 2020): 2017-2022. Accessed April 28, 2026. https://iocscience.org/ejournal/index.php/mantik/article/view/1060.