R. Rudi, A. Mariono, A. Sumarno, B. B. Prakoso, and P. Y. Pradana, “Teaching materials based on sinau digital unesa: can it improve students’ swimming knowledge?”, Sriwij. j. Sport, vol. 4, no. 2, pp. 86–97, Feb. 2025, doi: 10.55379/sjs.v4i2.20.