Kittisuban, Kanjanida, and Jintavee Khlaisang. “A Visualization System Using Positive Reinforcement Theory to Develop Problem-Solving Skills and Self-Esteem in Young College-Educated Farmers”. Journal of Education Studies 47, no. 4 (December 27, 2019): 65–85. Accessed April 28, 2024. https://so02.tci-thaijo.org/index.php/EDUCU/article/view/231845.