Noviana, M., dan D. Nilamsari. “The Effect Of Physio Ball Exercise On Sitting Balance In Children With Spastic Cerebral Palsy: The Effect Of Physio Ball Exercise On Sitting Balance In Children With Spastic Cerebral Palsy”. Jurnal Fisioterapi Indonesia, vol. 1, no. 1, Mei 2021, https://www.jurnalfisioindonesia.com.119-235-255-155.cpanel.site/jfi/index.php/jfti/article/view/6.