“The Effect Of Wall-Rebound Training On Underhand Passing Skills In Volleyball Among Students Participating In  The Volleyball Extracurricular Activity”, Compet. J. Pendidik. Kepelatihan Olahraga, vol. 18, no. 1, pp. 0703–0715, Feb. 2026, Accessed: Feb. 13, 2026. [Online]. Available: https://competitor.idjournal.eu/index.php/competitor/article/view/557