Simanjuntak, Jetri Jogi, Bukman Lian, and M Taheri Akhbar. 2023. “The Effect of Wrist Flexibility Exercise Using a Bottle on the Ability of Smash Badminton at the Extracurricular of SMK Negeri 2 Palembang”. Journal of Social Work and Science Education 4 (3):584-90. https://doi.org/10.52690/jswse.v4i3.594.