Punvong, Witoon, and Somchai Putta. 2026. “Guidelines For Environmental Administration in Educational Institutions of Tessaban1(Yiamketsuwan) School Under the Samut Prakan Municipality: Guidelines For Environmental Administration in Educational Institutions of Tessaban1(Yiamketsuwan) School Under the Samut Prakan Municipality”. Journal of Liberal Arts and Education (Online) 2 (2). Lampang, Thailand:16-27. https://so11.tci-thaijo.org/index.php/LAE/article/view/4203.