Bandi Utama , Tomoliyus , Fauzi , Hary Widodo. “Modification of Reactive Agility Test Measuring Instrument for Table Tennis Performance: Aiken’s Validity and Retest Reliability Test”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 14 (September 7, 2021): 3214–3220. Accessed May 4, 2024. https://turcomat.org/index.php/turkbilmat/article/view/10892.