Maryani, Anik, Fahmy Fachrezzy, and Ramdan Pelana. 2022. “The Effect of Coordination, Concentration, and Motivation on the Skills of Scoop and Chair Rhythmic Gymnastics on Students of Sman 39 Jakarta”. Gladi : Jurnal Ilmu Keolahragaan 13 (04):388-99. https://doi.org/10.21009/GJIK.134.04.