Nugraha, J. S., B. Hermansah, and W. Handayani. “The Contribution of Arm Muscle Strenth and Wrist Flexience to the Accurance of Doing the Services in Volleyball at SMK Negeri 5 Palembang”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 2, Oct. 2023, pp. 6101-8, doi:10.33487/edumaspul.v7i2.6413.