“The Effect of Underhand Passing Variation Training on Forearm Passing Skills in Volleyball Extracurricular Students at SMA Negeri 8 Palembang”. 2025. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 17 (3): 2929-36. https://competitor.idjournal.eu/index.php/competitor/article/view/416.