Jahri, Rahmat, and Dicky Reva Apriana Sanga Dwi. “Effectiveness of the Mud Jump Training Method on Improving Volleyball Jumping Spike”. Jurnal Pendidikan Jasmani (JPJ) 6, no. 3 (April 20, 2026): 621–625. Accessed August 15, 2026. https://stokbinaguna.ac.id/jurnal/index.php/JPJ/article/view/4560.