1. English as a global language Crystal, David, 1941- Cambridge, UK ; Cambridge University Press, 2012. ENG360 ENG450
3. Bridging the gaps in global communication Newsom, Doug. Malden, Mass. : Blackwell Pub., 2007. ENG140
4. English as a global language Crystal, David, 1941- Cambridge, UK ; Cambridge University Press, 2003. ENG250
5. World English: a study of its development Brutt-Griffler, Janina, 1966- Clevedon : Multilingual Matters, c2002. ENG450