Arayakemmakul, A., S. Dejbamrung, and S. Dejbamrung. “Ethics in the Educational System of Private Higher Education Institutions”. SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL, vol. 21, no. 1, Jan. 2026, pp. 29-42, https://so05.tci-thaijo.org/index.php/JSSRA/article/view/284188.