Putri, Berlina Anisa, and Zulmiyetri Zulmiyetri. “Improve the Ability to Recognize Vowal Letters through the Media Sand Paper Letter Modification in Deaf Children”. Edumaspul: Jurnal Pendidikan 8, no. 1 (March 1, 2024): 1540-1544. Accessed December 4, 2024. https://ummaspul.e-journal.id/maspuljr/article/view/7864.