Sukiri S, Nurulfa R, Musa M, Rahmadi T, Setiawan I. MENGUKUR PERCAYA DIRI, MOTIVASI BERPRESTASI ATLET ATLETIK REMAJA . Jurnal Speed [Internet]. 2021 Aug. 5 [cited 2026 Apr. 4];4(01):64-8. Available from: https://fkipunsika.id/index.php/speed/article/view/4901