1. English as a global language Crystal, David, 1941- Cambridge, UK ; Cambridge University Press, 2012. ENG360 ENG450
3. English as a global language Crystal, David, 1941- Cambridge, UK ; Cambridge University Press, 2003. ENG250
4. Cambridge IELTS. with answers : authentic practice tests Cambridge, United Kingdom : Cambridge University Press, 2020. IFYP001
6. The official Cambridge guide to IELTS: for academic & general training : student's book with answers Cullen, Pauline, Cambridge : Cambridge University Press, 2014. IFYP001 ECON214
8. IELTS preparation and practice: reading and writing academic module Sahanaya, Wendy, 1940- Melbourne, Australia : Oxford University Press, 1998
9. IELTS preparation and practice: listening and speaking Young, Denise, South Melbourne, Victoria : Oxford University Press, 2013. IFYP001 IFYP002
10. World English: a study of its development Brutt-Griffler, Janina, 1966- Clevedon : Multilingual Matters, c2002. ENG450
