Qudsi, D., S. Syahara, H. Irawadi, and Y. Setiawan. “Contribution of Leg Muscle Explosive Power and Waist Flexibility to the Accuracy of Volleyball Smashes”. Jurnal Patriot, Vol. 3, no. 1, Apr. 2021, pp. 48-62, doi:10.24036/patriot.v3i1.721.