Anwarudin, Muhammad, Muhammad Iqbal, and Tri Bayu Norito. “Correlation of Blood Muscle Strength and Waist Flexibility to students’ Roundhouse Kick Skills in Putera Sekar (Pencak Silat) Academy”. ETUDE: Journal of Educational Research 1, no. 1 (November 30, 2020): 7–12. Accessed December 5, 2022. https://alejournal.com/index.php/etude/article/view/16.