Endah, I. P. “Improving Learning Outcomes Passing Up In Game Volleyball Target Through Ring Model For Class VIII Students SMP Budi Mulia School Year 2019/2020”. Journal of Midwifery and Nursing, Vol. 2, no. 1, Dec, Dec. 2019, pp. 180-3, https://iocscience.org/ejournal/index.php/JMN/article/view/471.