chartwong, Pisith. “The Use of Free Time and Exercise Behaviors of Lower Secondary School Students in Yala Municipality”. Academic Journal of Thailand National Sports University 6, no. 1 (January 1, 2014): 1–14. Accessed May 19, 2024. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/255887.