หลวงราช เบญญาภา. “Factors Affecting to Self-Discipline of Students of Opportunity Expansion School in Phra Nakhon Si Ayutthaya”. Journal of Educational Review Faculty of Education in MCU 4, no. 3 (September 5, 2018): 87–96. accessed September 1, 2026. https://so02.tci-thaijo.org/index.php/EDMCU/article/view/144134.