Perna, Cristina Becker Lopes, y Aline Jéssica Antunes. «The Teaching of English and Portuguese As Additional Languages». BELT - Brazilian English Language Teaching Journal 9, no. 1 (septiembre 19, 2018): 1–3. Accedido julio 17, 2024. https://revistaseletronicas.pucrs.br/index.php/belt/article/view/29893.