“The Influence Of Push-Ups On The Accuracy Of Underhand Serves In The Women’s Volleyball Team Of Universitas PGRI Adi Buana Surabaya”. 2024. Jurnal Ilmiah Adiraga : Jurnal Penelitian Olahraga 10 (2): 58-68. https://doi.org/10.36456/adiraga.v10i2.9783.