21. Sociolinguistics: an introduction to language and society Trudgill, Peter. London : Penguin, c2000. ENG250
23. Journal of Asian Pacific communication. Clevedon, England ; Multilingual Matters, c1990- COUN400 ACT101
24. Code-mixing and code choice: a Hong Kong case study Gibbons, John, 1946- Clevedon, Avon, England ; Multilingual Matters, c1987. ENG250
25. Politeness: some universals in language usage Brown, Penelope. Cambridge [Cambridgeshire] ; Cambridge University Press, 1987. ENG486
