et. al., Saowapong Yamaphat,. “A Learning Model of Environmental Education to Enhance Environmental Ethics Behavior for Undergraduate Students in a University”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 8 (April 24, 2021): 2538–2543. Accessed May 5, 2024. https://turcomat.org/index.php/turkbilmat/article/view/3789.