Boonmee, S., J. Tupsai, B. Khamma, and S. Ounjantee. “A Fostering Environmental Awareness and Sustainable Problem-Solving in Early Childhood: Design Thinking Approaches to Plastic Waste Education”. Asia Research Network Journal of Education, vol. 5, no. 1, Apr. 2025, pp. 40-52, https://so05.tci-thaijo.org/index.php/arnje/article/view/279775.