Songsang , Yuttaporn, Sitthiporn Soonthorn, and Rungsun Injun. “Factors Affecting the Satisfaction of Those Taking the Assessment and Certification of Knowledge and Abilities: Case Study of the Institute for Skill Development 1, Samut Prakarn Province”. Interdisciplinary Academic and Research Journal 4, no. 1 (January 28, 2024): 287–304. accessed October 14, 2026. https://so03.tci-thaijo.org/index.php/IARJ/article/view/272097.