Brown, R. & Hanlon, C (1970) 'Derivational complexity and order of acquisition in child speech' In J R Hayes (ed.) Cognition and the Development of Language (New York. Wiley)
2.
Newport, E.L. , Gleitman, H. & Gleitman, L.R. (1977) 'Mother, I'd rather do it myself some effects and non-effects ofmaternal speech style' In C. E Snow& C A Ferguson (eds), Talking to Children (CambridgeCambndge University Press)
3.
Piatelli-Palmarini, M (ed ) (1980) Language and Learning. The Debate between Jean Piaget and Noam Chomsky (LondonRoutledge & Kegan Paul)
4.
Sinclair, A , Jarvella, R J. & Levelt, W. J M (eds) The Child's Conception of language (Berlin and New York. Springer-Verlag)