B-1, Reading_1, Unit 1,
Halliday, M.A.K. (2004 [1980]) ‘Three aspects of children’s language development: learning language, learning through language, learning about language’, in Halliday, M.A.K. (ed.) The Language of Early Childhood: Vol. 4 The Collected Works of M.A.K. Halliday, London, Continuum.