Hutomo, Angelina. “Analysis of Self-Efficacy and Mental Toughness on Peak Performance in U-16 Football Athletes of Koni, Bekasi City”. Jurnal Indonesia Sosial Sains 6, no. 1 (January 25, 2025): 44–53. Accessed December 26, 2025. https://www.jiss.publikasiindonesia.id.solusipublish.com/index.php/jiss/article/view/1566.