SUMARTONO. Developing Foreign Language Proficiency Through Speech Leaning in Early Childhood. Cakrawala: Jurnal Pendidikan, [S. l.], v. 4, n. 7, p. 14–19, 2010. DOI: 10.24905/cakrawala.v4i7.36. Disponível em: https://cakrawala.upstegal.ac.id/index.php/cakrawala/article/view/36. Acesso em: 11 jan. 2026.