1Halliday, M. A. K. 1975. Learning How to Mean. London: Edward Arnold.
2Tay, W. J. 1993. The English Language in Singapore: Issues and Development. Singapore: Unipress.
3R.osansky, E. 1975, "The critical period for the acquisition of languagesome cognitive developmental considerations," Working Papers on Bilingualism 6: 1-23.
4Yang, A. O, H, 1997. "Description of language use of four children (Chinese) in Singapore." Thesis, Singapore: National University of Singapore.
5Foley, J. A. 1998. English in the New Cultural Contexts: Reflections from Singapore. Singapore: Oxford University Press.
