Sitio, Arjon Samuel, Bosker Sinaga, and Humala 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) 3, no. 1, Mei (May 1, 2020): 19-21. Accessed March 29, 2024. https://iocscience.org/ejournal/index.php/abdimas/article/view/530.