Thanomvech , Paristha. “EVALUATION OF THE TRAINING PROGRAM ON INTERNAL OFFICIAL CORRESPONDENCE FOR TEACHERS USING CIPP MODEL”. Journal of Industrial Education 19, no. 2 (September 14, 2020): 12–19. Accessed May 19, 2024. https://ph01.tci-thaijo.org/index.php/JIE/article/view/240621.