Ngatman, Ngatman, Hedi Ardiyanto Hermawan, Amat Komari, Muhamad Nanang Solikhin, and sunaryo sunaryo. “Model of Assessment Instrument for Basic Techniques of Serving, Forehand and Backhand Groundstroke, Forehand and Backhand Volley Based on ‘acentos method’ for Junior Tennis Players in Yogyakarta Region”. Retos 59 (October 2, 2024): 584–594. Accessed October 19, 2024. https://recyt.fecyt.es/index.php/retos/article/view/103223.