Boonsom, Niwat. “Effects of a Combined Stretching Training on Flexibility of Students in Sports Science Program Silpakorn University”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 6, no. 3 (November 14, 2020): 599-611. Accessed April 19, 2024. https://ojs.unpkediri.ac.id/index.php/pjk/article/view/14904.