ธงศิลา ส., ตั้งคุณานันต์ ป. and บุญธิมา ร. (2015) “Affecting Factors of Self- discipline of Lower Secondary School Students in The Secondary Educational Service Area Office 2 Bangkok”, Journal of Industrial Education, 14(1), pp. 266–274. Available at: https://ph01.tci-thaijo.org/index.php/JIE/article/view/124494 (Accessed: 6 May 2024).