Juntsen, C. . “Development of a Model of Morning Assembly Activities and Uniforms for Students of Mahasarakham University Demonstration School (Secondary)”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University, vol. 16, no. 3, Dec. 2021, pp. 109-1, https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/250233.