Muhibbi, Muhammad, Taufiq Hidayah, and Sulaiman Sulaiman. “The Develoment of Speed Punch Reaction (SPR) As a Tool for Reaction Speed of Karate Punch Training”. Journal of Physical Education and Sports 7, no. 2 (July 15, 2018): 168-173. Accessed July 18, 2024. https://journal.unnes.ac.id/sju/jpes/article/view/25124.