Crystal, David and Cambridge Books Online EBS. 2012. English as a Global Language. Cambridge University Press. Electronic resource. https://go.openathens.net/redirector/city.ac.uk?url=https://doi.org/10.1017/CBO9781139196970.
Fromkin, Victoria, Robert Rodman, and Nina M. Hyams. 2014. An Introduction to Language. 10th ed., International ed. Wadsworth, Cengage Learning.
Hitchings, Henry. 2012. The Language Wars: A History of Proper English. 1st Picador ed. Picador.
Holmes, Janet. 2013. An Introduction to Sociolinguistics. 4th ed. Pearson.
Jenkins, Jennifer. 2015a. Global Englishes: A Resource Book for Students. Third edition. Routledge, Taylor & Francis Group.
Jenkins, Jennifer. 2015b. Global Englishes: A Resource Book for Students. Third edition. Routledge, Taylor & Francis Group. https://ebookcentral.proquest.com/lib/city/detail.action?docID=1770601.
Kirkpatrick, Andy. 2007. World Englishes: Implications for International Communication and English Language Teaching. Cambridge University Press.
Larsen-Freeman, Diane, and Marti Anderson. 2011. Techniques & Principles in Language Teaching. 3rd ed. Oxford University Press.
Melchers, Gunnel, and Philip Shaw. 2013. World Englishes. Second edition. Routledge.
Mooney, Annabelle, and Betsy Evans. 2019. Language, Society and Power: An Introduction. Fifth edition. Routledge, Taylor & Francis Group.
Parrott, Martin. 2010. Grammar for English Language Teachers. 2nd ed. Cambridge University Press.
Richards, Jack C., Theodore S. Rodgers, and Cambridge Books Online EBS. 2001. Approaches and Methods in Language Teaching. Cambridge University Press. Electronic resource. http://0-dx.doi.org.wam.city.ac.uk/10.1017/CBO9780511667305.