Ruangumpun, K. . and Samawathdana, R. . (2022) “PHYSICAL EDUCATION ADDITIONAL COURSE CURRICULUM USING GOAL SETTING THEORY TO ENHANCE CONCENTRATION OF PRIMARY SCHOOL STUDENTS”, Academic Journal of Thailand National Sports University. Chonburi, Thailand, 14(3), pp. 143–154. Available at: https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/251019 (Accessed: 9 May 2024).