Bibliografia

New language leader - upper intermediate.: Cotton, D., Falvey, D. & Kent, S. 2014 Cotton, D., Falvey, D. & Kent, S. (2014). New language leader - upper intermediate. Harlow, Essex: Pearson Education.
s the world really better than ever?: Burkeman, O. 2017 Burkeman, O. (2017, July 28). Is the world really better than ever? The Guardian. Consultado em 14 jul. 2021, em https://www.theguardian.com/news/2017/jul/28/is-the-world-really-better-than-ever-the-new-optimists
Macmillan English grammar in context - intermediate: Vince, M. 2008 Vince, M. (2008). Macmillan English grammar in context - intermediate. Oxford: Macmillan Education.

Does the richness of the few benefit us all?: Bauman, Z. 2013 Bauman, Z. (2013). Does the richness of the few benefit us all? Political Studies Review, 12(3), 402-3.
English verbs and tenses.: Bourke, K. 2003 Bourke, K. (2003). English verbs and tenses. Oxford: Oxford University Press.
English grammar: Bourke, K. 2003 Bourke, K. (2003). English grammar. Oxford: Oxford University Press.
Oxford advanced learner's dictionary (8th ed): Hornby, A.S. 2010 Hornby, A.S. (2010). Oxford advanced learner's dictionary (8th ed). Oxford: Oxford University Press.
English vocabulary in use - advanced.: McCarthy, M. & O'Dell, F. 2002 McCarthy, M. & O'Dell, F. (2002). English vocabulary in use - advanced. Cambridge: Cambridge University Press.