Armen, Meiriani, and Ary Suud Cahyo Alben. 2023. “The Influence of The Learning-to-Swim Method Using Fins and Swimming Boards on The Butterfly-Style Swimming Ability of SeaRIA Aquatic Athletes”. Indonesian Journal of Sport Management 3 (2):305-10. https://doi.org/10.31949/ijsm.v3i2.7795.