wongsaard, sorawit, A. Chakkornburi, N. Naknual, T. Inyaso, S. Phanna, and K. Kimnae. “THE SAPPAYA PRINCIPLE AND SOCIAL DEVELOPMENT IN THE MODERN ERA”. Journal of Chaiyaphum Review, vol. 2569, no. 2, July 2026, pp. 223-35, https://so02.tci-thaijo.org/index.php/jcr/article/view/288107.