Wacharadhorntumrong, P., Sirithadakunlaphat, S., & Chumphol , N. (2023). The Development of Training Course Enhancing Leadership for Lower Secondary Students at Bansuanudomvittaya School, Chonburi Province. Journal of Roi Et Rajabhat University, 17(1), 221–230. Retrieved from https://so03.tci-thaijo.org/index.php/reru/article/view/254268