Trangrattanachit, S. (2022) “Volunteer development model for enhancing moral values and ethical characteristics of the student council of Omnoisophonchanoopathum School”, Mahachula Academic Journal. Bangkok, Thailand, 9(1), pp. 213–225. Available at: https://so04.tci-thaijo.org/index.php/JMA/article/view/254864 (Accessed: 18 April 2024).