Rungrotrangsan, Kasamon, Narongsak Rorbkorb, and Tavarintorn Rukbumrung. “A Development of the Sportsmanship Scale of Athletes in The Institute of Physical Education”. Academic Journal of Thailand National Sports University 10, no. 3 (September 3, 2018): 317–332. Accessed May 17, 2024. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/248295.