“Self-Confidence of The Rugby Athletes of The Responsible Contingent Following The PON XXI Championship Aceh-Sumut 2024”, Compet. J. Pendidik. Kepelatihan Olahraga, vol. 17, no. 1, pp. 410–417, Feb. 2025, Accessed: Mar. 19, 2026. [Online]. Available: https://competitor.idjournal.eu/index.php/competitor/article/view/209