โพธิ์จันทร์ ว. “The Effects of Art Camp in Nature and Environment Art for Fourth Grade Students of the Demonstration School Khon Kaen University”. Journal of Education Khon Kaen University (Graduate Studies Research), vol. 11, no. 4, May 2018, pp. 167-72, https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/125467.