Charoenkul, N. ., and H. . Tomioka. “Human Value Creating Global Citizenship: A Lesson Learned from Soka Education and International Perspectives”. Kasetsart Journal of Social Sciences, vol. 42, no. 3, July 2021, pp. 571–576, https://so04.tci-thaijo.org/index.php/kjss/article/view/253483.