RATNIAWATI, Augustina. Clinical–Educational Qualitative Case Study of Speech Delay in a Four-Year-Old Boy. Qualitative Research in Early Childhood Education, [S. l.], v. 1, n. 2, p. 52–67, 2026. DOI: 10.66291/qr-ece.v1i2.7. Disponível em: https://journals-arendra.or.id/rumahjurnal/index.php/QR-ECE/article/view/7. Acesso em: 23 apr. 2026.