Yahakorn, Suwannee. 2020. “The Development of Competency on Learning Management by Using the Lesson Study of Thai Teachers Elementary Schools in Nonthaburi Province”. Princess of Naradhiwas University Journal of Humanities and Social Sciences 7 (2):89-106. https://so05.tci-thaijo.org/index.php/pnuhuso/article/view/241336.