Dimyati D, Susanto E, Purwanto J. The Contribution of Self-Confidence to Mental Toughness Among Sport-Class Student-Athletes. sj [Internet]. 2025 Dec. 30 [cited 2026 Oct. 21];5(2):213-25. Available from: https://journal-center.litpam.com/index.php/sfj/article/view/5378