New language leader - upper intermediate: Cotton, D., Falvey, D. & Kent, S.2014Cotton, D., Falvey, D. & Kent, S. (2014). New language leader - upper intermediate. Harlow, Essex: Pearson Education.
Is the world really better than ever?: Burkeman, O.2017Burkeman, 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.2008Vince, M. (2008). Macmillan English grammar in context - intermediate. Oxford: Macmillan Education.
Secundária
Does the richness of the few benefit us all?: Bauman, Z.2013Bauman, Z. (2013). Does the richness of the few benefit us all? Political Studies Review, 12(3), 402-3.
English verbs and tenses: Bourke, K.2003Bourke, K. (2003). English verbs and tenses. Oxford: Oxford University Press.
English grammar: Bourke, K.2003Bourke, K. (2003). English grammar. Oxford: Oxford University Press.
English vocabulary in use - advanced: McCarthy, M. & O'Dell, F.2002McCarthy, M. & O'Dell, F. (2002). English vocabulary in use - advanced. Cambridge: Cambridge University Press.