Christian, Imanuel Vicky, and Arie Setiawan Prasida. “Developing Board Game As Learning Media about Waste Sorting for Fourth Grade Students of Elementary School”. Jurnal Prima Edukasia 6, no. 1 (January 9, 2018): 78–88. Accessed May 9, 2025. https://journal.uny.ac.id/index.php/jpe/article/view/17148.