Bibliografia

Vince, M. (2008) Macmillan English grammar in context - intermediate. Vince, M. (2008). Macmillan English grammar in context - intermediate. Macmillan Education.
Cotton, D., Falvey, D. & Kent, S. (2014) New language leader - upper intermediate. Cotton, D., Falvey, D. & Kent, S. (2014). New language leader - upper intermediate. Pearson Education.
Burkeman, O. (2017) Is the world really better than ever? 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

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