Nugroho, Djoko, Mohammad F. Hidayatullah, Muchsin Doewes, and Sapta K. Purnama. 2022. “The Effects of Massed and Distributed Drills, Muscle Strength, and Intelligence Quotients towards Tennis Groundstroke Skills of Sport Students”. Pedagogy of Physical Culture and Sports 27 (1):14-23. https://doi.org/10.15561/26649837.2023.0102.