Ramadhan, Riki, Eva Riris Simanjuntak, Liana Fallah, and Ayung Candra Padmasari. “Designing an Educational Game ‘Cleantopia’ to Increase students’ Awareness of Environmental Cleanliness at Mekarsari Elementary School”. Jurnal Inovasi Teknologi Pendidikan 11, no. 1 (March 9, 2024): 12–23. Accessed June 5, 2025. https://journal.uny.ac.id/index.php/jitp/article/view/56768.