Dharma, M. A., S. Mukaromah, and T. Hidayah. “DIFFERENCES OF GROUNDSTROKE TRAINING METHOD AND HAND EYE COORDINATION ON RALLY 3 MINUTES CAPABILITY IN JUNIO TECAD PEKALONGAN DISTRICT”. Journal of Physical Education and Sports, Vol. 9, no. 2, July 2020, pp. 120-7, http://journal.unnes.ac.id/sju/jpes/article/view/39209.