Sahabuddin, Sahabuddin, Hikmad Hakim, Syahruddin Syahruddin, and Davi Sofyan. “Disciplinary Levels of Student Volleyball Athletes”. Indonesian Journal of Sport Management 3, no. 2 (October 31, 2023): 242–260. Accessed February 21, 2024. https://ejournal.unma.ac.id/index.php/ijsm/article/view/7256.