1.
Phonsa K, Sroinam S, Phongphinyo P. Strategies for Developing the 21st Century Skills of School Principals under Loei Primary Educational Service Area Office. EDU [Internet]. 2019 Mar. 27 [cited 2024 Nov. 23];5(1):198-206. Available from: http://asianonlinejournals.com/index.php/EDU/article/view/404