Mooltha, S. ., and S. . Bhiasiri. “The research study the result of the visual art learning in creative Tung Isan Flag by project-based learning for Grade 9 students”. Journal for Developing the Social and Community, vol. 9, no. 2, Aug. 2022, pp. 123-36, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254523.