Wongyai, Thichaya, Saman Asawapoom, Pongsak Tongpanchang, and Surasak Srikrachang. 2022. “A Participatory Action Research for Teachers’ Development towards The 21st Century Students”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University 17 (3):29-44. https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/252468.