NAINGGOLAN, Melda Agustina; HADI, Wisman. KEMAMPUAN BERBICARA ANAK TUNAGRAHITA: STUDI KASUS DI SLB C SANTA LUSIA MEDAN. JURNAL SASTRA INDONESIA (SASINDO), [S. l.], v. 6, n. 2, 2017. DOI: 10.24114/sasindo.v6i2.7771. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/sasindo/article/view/7771. Acesso em: 4 sep. 2025.