Budi DR, Syafei M, Kusuma MNH, Suhartoyo T, Hidayat R, Listiandi AD. The significance of exercise method on forehand and backhand groundstroke skills improvement in tennis. SPORTIF [Internet]. 2020 Apr. 21 [cited 2024 Dec. 22];6(1):132-44. Available from: https://ojs.unpkediri.ac.id/index.php/pjk/article/view/13920