THE DEVELOPMENT OF SECOND LANGUAGE IN TWINS VERSUS SINGLES. Pakistan Journal of Social Research, [S. l.], v. 3, n. 4, p. 503–519, 2021. DOI: 10.52567/pjsr.v3i4.312. Disponível em: https://ojs.pjsr.com.pk/index.php/PJSR/article/view/312. Acesso em: 5 aug. 2025.