Sukiri S, Nurulfa R, Musa M, Rahmadi T, Setiawan I. MENGUKUR PERCAYA DIRI, MOTIVASI BERPRESTASI ATLET ATLETIK REMAJA . Jurnal Speed [Internet]. 2021Aug.5 [cited 2024Nov.19];4(01):64-8. Available from: https://journal.unsika.ac.id/speed/article/view/4901