Sukiri, Sukiri, Rizky Nurulfa, Mustara Musa, Taufik Rahmadi, and Iwan Setiawan. 2021. “MENGUKUR PERCAYA DIRI, MOTIVASI BERPRESTASI ATLET ATLETIK REMAJA”. Jurnal Speed (Sport, Physical Education, Empowerment) 4 (01):64-68. https://journal.unsika.ac.id/index.php/speed/article/view/4901.