Efforts to Improve Language Skills through the Use of Letter Cards in Children at RA Kusuma Mulia I. DEEP LEARNING: Journal of Educational Research, [S. l.], v. 1, n. 2, p. 87–95, 2025. DOI: 10.62945/deeplearning.v1i2.258. Disponível em: https://ejournal.mgedukasia.or.id/index.php/deeplearning/article/view/258. Acesso em: 15 oct. 2025.