Arte, Yanse Betna, Agung Wahyudi, and Nasuka Nasuka. 2019. “The Effect of Plyometric Exercise and Arm Muscle Strength on Smash Ability of Pervoba Volleyball Athletes”. Journal of Physical Education and Sports 8 (5), 138-44. https://journal.unnes.ac.id/sju/jpes/article/view/33991.