Santoso, Danang Ari, and Moh. Agung Setiabudi. 2019. “The Analysis of Biomechanics on Footwork Step Pattern Spike Toward Power Spike of Volleyball Sport”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 5 (1), 29-40. https://doi.org/10.29407/js_unpgri.v5i1.12500.