Sitorus, Marta, Dwi Br Tarigan, Erike Mahara, Delon Bintang, Lewi Nababan, Deni Marpaung, and Randi Kurniawan. “Evidence-Based Analysis Of Basic Volleyball Training Methods: Focus On Overhand Serves And Underhand Passes”. STAMINA 8, no. 4 (December 30, 2025): 166-177. Accessed October 1, 2026. http://stamina.ppj.unp.ac.id/index.php/JST/article/view/1323.