Hermawan, A. (2023). Increasing Motivation to Learn Volleyball Games by Warming Up the Game (Kasti Ball) in Grade IV Students at SDN Jumblang, Kandangan District. USANTARA PORTA: urnal endidikan an lmu eolahragaan, 1(01), 35–45. https://doi.org/10.2024/ns.v3i04.2025_P559-568