Supjalern, R. “The Development of Competency According to the Four Sublime States of Mind for Executives Tambon Health Promoting Hospital”. Education journal Faculty of Education, Nakhon Sawan Rajabhat University, vol. 5, no. 3, Dec. 2022, pp. 49-58, https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/256800.