Sutopo, Wisnu Guntur, Fajar Azizah, and Romy Abdul Rozak. 2022. “Effect of SandBall Tool Modification on Sideways-Style Bullet Repellent Learning Outcomes of Junior High School Students”. JUMORA: Jurnal Moderasi Olahraga 2 (2):137-47. https://doi.org/10.53863/mor.v2i2.294.