Damayanti, Desi, Setya Rahayu, and Harry Pramono. “Modification of Baseball Beater for Elementary School Physical Education Learning”. Journal of Physical Education and Sports 7, no. 2 (July 30, 2018): 174-179. Accessed June 17, 2024. http://journal.unnes.ac.id/sju/jpes/article/view/24338.