Puichumpol, Piyorot, Wilaypin Kaewpeng, and Chailikit Soipetkasem. 2019. “A STUDY ON SPORT ACHIEVEMENT MOTIVATION IN STUDENTS OF SOUTHERN SPORTS SCHOOL”. Academic Journal of Thailand National Sports University 11 (2). Chonburi, Thailand:275-89. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/244720.