Irham, Yoyon, et al. “The Effect of Training Media and Playing Concentration on the Shooting Accuracy of Petanque Athletes at Universitas Negeri Padang”. Gladi : Jurnal Ilmu Keolahragaan, vol. 13, no. 03, Nov. 2022, pp. 330-46, doi:10.21009/GJIK.133.08.