Viwattananon S, Sirichot P. The Development of Training Program for Improving Efficiency of Quality Management System Utilized by Head of Academic Department in Secondary School. Ph.D. in Soc. Sci. J. [Internet]. 2020 Apr. 27 [cited 2024 Apr. 26];10(1):179-96. Available from: https://so05.tci-thaijo.org/index.php/phdssj/article/view/230001