Wongtim, Sukaroon, Vandee Sangprateeptong, Choochat Phuangsomjit, Wasana Taveegulasub, Koolchalee Chongcharoen, and Ongart Sumrum. 2020. “A Study of Research Direction in School of Educational Studies, Sukhothai Thammathirat Open University”. STOU Education Journal 13 (2):100-114. https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/229843.