โบราณมูล ประพิศ. “The application of the Principles of Four Virtues for studying of the Layman Students of Mahamakut Buddhist University, Roi-et Campus B.E 2549”. Journal of Yanasangvorn Research Institute Mahamakut Buddhist University 1, no. 1 (December 28, 2010): 100–110. accessed September 25, 2026. https://so04.tci-thaijo.org/index.php/yri/article/view/175067.