“The Effect of Underhand Passing Variation Training on Forearm Passing Skills in Volleyball Extracurricular Students at SMA Negeri 8 Palembang”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, vol. 17, no. 3, Oct. 2025, pp. 2929-36, https://doi.org/10.26858/cjpko.v17i3.416.