Somumcharn, Metheesin. “Study the Use of CIPP Model of 5S to Improve the Quality Seka Industrial and Community Education College”. Rajapark Journal 14, no. 33 (April 20, 2020): 169–178. Accessed April 20, 2024. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/240024.