Sangkaew, Malai, Nongnapas Thiengkamol, and Chatchai Thiengkamol. “Model of Ecosystem and Environmental Conservation Behavior of Junior High School Students”. KASEM BUNDIT JOURNAL 17, no. 2 (December 30, 2016): 140–150. accessed September 28, 2026. https://so04.tci-thaijo.org/index.php/jkbu/article/view/69404.