Laoseenart N, Namwan T. Guidelines for Development of Teachers for the 21st Century Learning Management of Schools under Mahasarakham Provincial Administrative Organization: Guidelines for Development of Teachers for the 21st Century Learning Management of Schools under Mahasarakham Provincial Administrative Organization. rtnb [internet]. 2024 Apr. 28 [cited 2026 Sep. 9];6(1):96-112. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/4041