1Brock, C. 1986. The effects of referential questions on ESL classroom discourse. TESOL Quarterly 20 (1), 47-59.
2Ellis, R. 1994. The study of second language acquisition. Oxford: Oxford University Press.
3Good, T. & J. Brophy. 1987. Looking in classrooms. New York: Harper & Row.
4Long, M. & C. Sato. 1983. Classroom foreigner talk discourse: Forms and functions of teachers' questions. In H. Seliger & M. Long (eds.), Classroom oriented research in second language acquisition. Rowely: Newbury House. pp. 268-285.
5Nunan, D. 1987. Comnmnicative language teaching: Making it work. ELT Journal 41 (2), 136-145.
6Richards, J & C Lockhart. 1996. Reflective teaching in second language classrooms. Cambridge: Cambridge University Press.
7Richards, J , J Platt & H. Platt. 1998. Longman dictionary of language teaching and applied linguistics. Beijing Foreign Language Teaching and Research Press.
8Thompson, G. 1997. Training teachers to ask quesions. ELT Journal 51 (2), 99-105.
9Thornbury, S. 1996. Teachers research teacher talk. ELT Journal 50 (4), 279-289.
