Sitio, A. S., B. Sinaga, and H. Simangunsong. “PKM : Pelatihan Public Speaking Bagi Penyandang Tunagrahita SLB Karya Murni Medan Johor: Pelatihan Public Speaking Bagi Penyandang Tunagrahita SLB Karya Murni Medan Johor”. TRIDARMA: Pengabdian Kepada Masyarakat (PkM), vol. 3, no. 1, Mei, May 2020, pp. 19-21, https://www.iocscience.org/ejournal/index.php/abdimas/article/view/530.