Aswina, Mayang Safitri, and Pratikto Herlan. “Economic Effectiveness of Tokens in Improving Eating Patterns in Mental Retardation Children: Efektivitas Ekonomi Token Dalam Memerbaiki Pola Makan Pada Anak Retardasi Mental”. Proceedings of The ICECRS 8 (July 3, 2020). Accessed October 5, 2025. https://icecrs.umsida.ac.id/index.php/icecrs/article/view/441.