Edwards, D.
and
Mercer, N.1987: Common knowledge.
London:
Methuen.
2.
Heath, S. B.1983: Ways with words: language, life and work in communities and
classrooms. Cambridge: Cambridge
University Press.
3.
Martin, J. R.1984: Types of writing in infants and primary school.
Proceedings of Macarthur Institute of Higher Education, Reading
Language Symposium 5:
Reading, Writing and Spelling
.