Pimpa, Phatarawan, Wanphan Nanthasri, and Apisit Somsrisuk. “The Development of Morale Indicators of Teachers in School under Secondary Educational Service Area Office 23”. STOU Education Journal 13, no. 2 (December 30, 2020): 132–144. accessed September 28, 2026. https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/178954.