Jaichalad, Nongluck. “The Opinions, Reasons and Arranging Activities to Promote Morality and Ethic for Students of Primary Schools in Vietnam”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 12, no. 1 (June 27, 2018): 1–14. Accessed May 7, 2024. https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/130881.