MORALES, Marianne. Real English Interactive Level 1 Version 2.0. CALICO Journal, [S. l.], v. 18, n. 1, p. 187–195, 2013. DOI: 10.1558/cj.35133. Disponível em: https://journal.equinoxpub.com/Calico/article/view/16707.. Acesso em: 16 jul. 2024.