Az Zahra, A. A., N. W. Audrey, D. S. Ichyana, T. Saskianti, S. Pradopo, S. C. Nelwan, and M. Masyithah. “Effectiveness of the Use of Manual and Electric Toothbrushes and the Effect of Educational Brushing Teeth With Video Animation on OHI-S Children With Down Syndrome”. Indonesian Journal of Dental Medicine, vol. 4, no. 1, July 2021, pp. 6-10, doi:10.20473/ijdm.v4i1.2021.6-10.