Syafii, M., Karo-Karo, A. A. P., Sari, L. P., Aditya, R., Helmi, B., & Simangunsong, B. A. (2022). Development of soft takraw balls for children. Jurnal Keolahragaan, 10(2), 239–246. https://doi.org/10.21831/jk.v10i2.49935