Aditya, Rinaldi, Boby Helmi, and Khairul Usman. “Development of Athletic Equipment Modifications In PJOK Learning Elementary School: Development of Athletic Equipment Modifications In PJOK Learning Elementary School”. Journal of Midwifery and Nursing 2, no. 1, Dec (December 19, 2019): 153-158. Accessed November 28, 2020. https://iocscience.org/ejournal/index.php/JMN/article/view/466.