SITIO, A. S.; SINAGA, B.; SIMANGUNSONG, H. 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), [S. l.], v. 3, n. 1, Mei, p. 19-21, 2020. Disponível em: https://www.iocscience.org/ejournal/index.php/abdimas/article/view/530. Acesso em: 17 apr. 2026.