Herudi E, Oman U. Subandi, Hernawan. The Butterfly Style Swimming Learning Model for Children in the 5 Year Old Group. GJIK [Internet]. 2023 Dec. 31 [cited 2024 Nov. 5];14(04):449-60. Available from: https://journal.unj.ac.id/unj/index.php/gjik/article/view/38282