Manajit D, Weeraponkan B, Phrakhru Pijitsupakarn PP. Guideline for the Development of Director Attributes According to Threefold Training, Phang Nga Vocational College. JMH.R. [Internet]. 2022 Dec. 29 [cited 2024 May 21];8(2):181-98. Available from: https://so03.tci-thaijo.org/index.php/human/article/view/258067