Kaewsup W, khunkitti kit, Panngran N, Wongsuwan M. ACHIEVEMENT MOTIVATION OF MARATHON RUNNERS IN UTTARADIT PROVINCE. JSSH [internet]. 2024 Dec. 31 [cited 2026 Sep. 19];25(3):172-85. available from: https://he02.tci-thaijo.org/index.php/spsc_journal/article/view/270633