La-armat, W., Nanthasri, W. and Somsrisuk, A. (2026) “NEEDS ASSESSMENT OF ENVIRONMENTAL MANAGEMENT IN SCHOOLS UNDER SAKON NAKHON PRIMARY EDUCATIONAL SERVICE AREA OFFICE 3”, Journal of Graduate School Sakon Nakhon Rajabhat University. Sakon Nakhon, Thailand, 23(102), pp. 443–457. available at: https://so02.tci-thaijo.org/index.php/SNGSJ/article/view/277906 (accessed: 10 October 2026).