Promrit, N., K. Rattanapan, S. Jitpukdee, and U. . Muneenam. “Environmental Curriculum Development of Solid Waste Management for Student in Matayom 1: A Case Study of Samet Chuan Wittayacom School, Thung Yai District, Nakhon Si Thammarat Province”. Journal of Vocational Education in Agriculture, vol. 5, no. 1, June 2021, pp. 9-27, https://li01.tci-thaijo.org/index.php/JVIA/article/view/249341.