Hardiansyah, Humaedi, Hendra Iskandar, Muh. Saldi, Khairil Fajri, Sardiman, and Krisyanto batong Lumbaa. “Foot Reaction Speed Training to Improve 60 M Sprint Ability (Grade VII)”. Musamus Journal of Physical Education and Sport (MJPES), Vol. 7, no. 3, Dec. 2025, pp. 606-14, https://ejournal.unmus.ac.id/index.php/physical/article/view/7263.