Singkham, H., & Wechayaluck , N. . (2022). A Comparison of the Efficiency in Team Work of School’s Personnel under the Secondary Educational Service Area Office Sukhothai during the Coronavirus Disease (COVID-19) Epidemic Situation. Journal of Modern Learning Development, 7(5), 255–270. retrieved from https://so06.tci-thaijo.org/index.php/jomld/article/view/254841