Hidayatullah, A. F., N. Nasuka, and A. Wahyudi. “The Effect of Training Method and Arm Length on Spike Back Attack Ability in Junior Athletes of Bina Taruna Semarang Volleyball Club”. JUARA : Jurnal Olahraga, Vol. 8, no. 2, July 2023, pp. 843-50, doi:10.33222/juara.v8i2.3379.