Lalu Muh. Alwan Ardiansyah, Nopi Hariadi, Zaenul Arkanuddin, Rina Nopiana, M. Julian, M. Salehudin, and M. Zamroni. “Changes in Vertical Jump Performance Following a Four-Week Agility-Ladder Program in Amateur Football Players”. Musamus Journal of Physical Education and Sport (MJPES), Vol. 8, no. 4, Sept. 2026, pp. 1313-6, doi:10.35724/mjpes.v8i4.7965.