Aksir, I., W. S. Suherman, A. Alim, H. Hasmyati, and A. A. Mappanyukki. “Development of Tennis Skills Training Based on Trainer Model for Beginner Athletes”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran, Vol. 9, no. 3, Dec. 2023, pp. 496-13, doi:10.29407/js_unpgri.v9i3.21634.