Rahmadana, Restu, and Maidarman Maidarman. 2019. “Analisis Keterampilan Renang Gaya Bebas Atlet Sailfish Swimming Club Padang”. Jurnal JPDO 1 (1), 14-18. http://jpdo.ppj.unp.ac.id/index.php/jpdo/article/view/149.