Tangphetsiripong, T. ., S. . Srikhruedong, and W. . Titichoatrattana. “Self-Development According to Yonisomanasikarn Principles”. Academic MCU Buriram Journal, vol. 7, no. 1, June 2022, pp. 264-78, https://so06.tci-thaijo.org/index.php/ambj/article/view/252035.