Mooltha, Sukonthamas, and Siribhong 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 9, no. 2 (August 2, 2022): 123–136. accessed October 7, 2026. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254523.