Ismail. “HASIL BELAJAR RENANG GAYA BEBAS MELALUI MODEL SISTEM PERSONAL DI SMA N 1 KUALUH HULU PROVINSI SUMATRA UTARA”. Jurnal Locomotor 8, no. 9 (October 8, 2022). Accessed October 19, 2025. https://locomotor.untan.ac.id/index.php/fe/article/view/57.