Pramudya CNS, Burhaein E. Physical Profile: 50-Meter Freestyle Swimming Times, 13-14 Y.O, Kebumen Swimmers. penjas [Internet]. 4 Juni 2026 [dikutip 12 Juni 2026];5(2):362-71. Tersedia pada: https://journal.uniga.ac.id/index.php/penjas/article/view/43872