Suci Nanda Sari, Juana Wangsa Putri. The Effect of Feedback and Motivation on Service Ability in Junior Tennis Athletes in West Sumatera. jipes [Internet]. 2022Aug.14 [cited 2025Aug.11];8(1):10-4. Available from: http://103.8.12.212:33180/unj/index.php/jipes/article/view/21986