Karnadipa, T., dan A. . Rahmadhani Astuti. “The Effectiveness of NDT to Improve Standing Balance in A 2-Years-Old Down Syndrome Child”. 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/1.