Saisakha, Nidlawan, Chomsupak Cruthaka, and Duangduen Chancharoen. “A Core Competencies Enhancement Training Program for Bangkok Airways Personnel Using the Learning by Doing Principle”. Ph.D. in Social Sciences Journal 10, no. 3 (December 26, 2020): 691–705. Accessed May 20, 2024. https://so05.tci-thaijo.org/index.php/phdssj/article/view/160650.