Widiyatmoko, Fajar Ari, Buyung Kusumawardhana, and Muhammad Nur Ali Imran. “The Comparison of Elbow Extension and Elbow Flexion Movement Toward Forehand Accuracy of Court Tennis”. Journal Sport Area 6, no. 1 (January 2, 2021): 10–14. Accessed April 20, 2024. https://journal.uir.ac.id/index.php/JSP/article/view/4229.