1. IELTS grammar: for bands 6.5 and above Hopkins, Diana, 1961- Cambridge : Cambridge University Press, 2021. IFYP001
2. Understanding politeness Kádár, Dániel Z., 1979- Cambridge : Cambridge University Press, 2013. ENG486
3. Syntax: basic concepts and applications Freidin, Robert. Cambridge ; Cambridge University Press, 2012. ENG140
4. An introduction to phonetics and phonology. Clark, John (John Ellery) Malden, Mass. ; Blackwell Publishing, 2007. ENG202 ENG381
