Hanafi, Suriah. “The Role of Mental Concentration on Accuracy of Upper Passing in Volleyball: A Systematic Literature Review”. Journal Physical Health Recreation (JPHR) 5, no. 2 (May 31, 2025): 441-446. Accessed May 14, 2026. https://jurnal.stokbinaguna.ac.id/index.php/JPHR/article/view/3961.