Sukwong T, Sriramatr S, Chankuna D. COMPARISON OF EXERCISE BEHAVIOR OF THE PERSONAL FITNESS TRAINER. J.TNSU [Internet]. 2020 Dec. 31 [cited 2024 May 18];13(1):81-90. Available from: https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/248339