- Meyer, C.F. (2009). Introducing English Linguistics. Cambridge: Cambridge University Press. Ch. 4
- Becker, A., Bieswanger, M. (2006). Introduction to English Linguistics. Tübingen/Basel: A. Francke Verlag.
- Jenkins, J. (2003). World Englishes: A resource book for students. London: Routledge, pp. 143-150.
Language practice classes (lettorato):
- Gallagher, A., Galuzzi, F. (2014). Activating Grammar, digital edition. Milano: Pearson Longman Italia.
- Dummett, P., Hughes, J., Stephenson, E. (2018). Life – Second Edition: Life Intermediate Student’s Book with App Code. National Geographic Learning.