Goganutapon, Kachin. “Forecast the Number of Unemployed in Thailand Classified by Education Level Using Differential Equation Model”. Progress in Applied Science and Technology 10, no. 1 (June 18, 2020): 117–135. Accessed May 20, 2024. https://ph02.tci-thaijo.org/index.php/past/article/view/242912.