Kobjaiklang, Chulaporn, Thidsanu Methawudthisakun, Apimuk Sadompruk, and Natthaporn Thaijongrak. “Promotion and Development of Vocational Personnel Education in Tourism and Service Sectors of Thai-Cambodian Border Area Ubon-Ratchathanai and Sisaket Provinces”. Journal of Modern Learning Development 5, no. 5 (October 30, 2020): 283–297. accessed December 11, 2025. https://so06.tci-thaijo.org/index.php/jomld/article/view/244828.