1. Bolinger, D. L.(1989). Intonation and its uses: melody in grammar and discourse. London: Edward Arnold.
2. Group training in communication skills for carers of adults with aphasia;Booth;International Journal of Language and Communication Disorders,1999
3. Brazil, D. (1985). The communicative value of intonation in English (Discourse Analysis Monograph No. 8). Birmingham: Bleak House Books, and English Language Research, University of Birmingham.
4. Brazil, D. (1995). A grammar of speech Oxford: Oxford University Press.
5. Brazil, D. (1997). The communicative value of intonation in English (2nd ed.). Cambridge: Cambridge University Press.