3Beebe, L. M. & T. Takahashi. 1989. "Sociolinguistic vari- ation in face- threatening speech acts". In M. R. Eisen- stein (ed.). The Dynamic Interlanguage : Empirical Stud- ies in Second Language Variation. New York: Plenum Press.
4Bell, N. 1998. " Politeness in the speech of Korean ESL learners. " Working Papers in Educational Linguistics 14/ 1. pp. 25-47.
5Brown, P. & S. Levinson. 1987. Politeness: Some Univer- sals in Language Usage. London: Cambridge University Press.
6Cheng, W. & A. B. M. Tsui. 2009. "'ahh ((laugh)) well there is no comparison between the two I think' : How do Hong Kong Chinese and native speakers of English disa- gree with each other?" Journal of Pragmatics 41/11. pp. 2365 - 2380.
7Garcfa, C. 1989. "Disagreeing and requesting by Americans and Venezuelans". Linguistics and Education 1/3. pp. 299 - 322.
8Guiller, J. & A. Durndell. 2006. "4 totally agree with you'.- Gender interactions in educational online discussion groups". Journal of Computer Assisted Learning 22/5. pp. 368 - 381.
9Holtgraves, T. 1997. "Yes, but .- Positive politeness in conversation argument". Journal of Language and Social Psychology 16/2. pp. 222 -239.
10Kotthoff, H. 1993. " Disagreement and concession in dis- putes: On the context sensitivity of preference structures". Language in Society 2/2. pp. 193 -216.