Ruechai, B., and K. Numtong. “A Study of Confucius Concepts on the Dimension of Happiness from the Lun Yu Scriptures”. Lawarath Social E-Journal, vol. 4, no. 1, Apr. 2022, pp. 33-54, https://so04.tci-thaijo.org/index.php/lawarathjo/article/view/256475.