HARPER, Rowena. From principles to practice: Implementing an English language proficiency model at UniSA. Journal of Academic Language and Learning, [S. l.], v. 7, n. 2, p. A150-A164, 2013. Disponível em: https://journal.aall.org.au/index.php/jall/article/view/262. Acesso em: 2 jul. 2024.