Akhmad, Imran, Tarsyad Nugraha, and Petrus Sembiring. “Speed, Agility, and Quickness (SAQ) Training of the Circuit System: How Does It Affect Kick Speed and Agility of Junior Taekwondo Athletes? ”. Journal Sport Area 6, no. 2 (July 21, 2021): 175–182. Accessed July 3, 2024. https://journal.uir.ac.id/index.php/JSP/article/view/6433.