Bronfenbrenner, U. (1992). Ecological systems theory. In R. Vasta (ed.), Six Theories of Child Development (London: Jessica Kingsley Publishers ).
2.
Golinkoff, R.M. & Gordon, L. (1983). In the beginning was the word: a history of the study of child language. In R. M. Golinkoff (ed.), The Transition from Prelinguistic to Linguistic Communication (New York: Lawrence Erlbaum).
3.
Karmiloff-Smith, A. (1992). Beyond Modularity: A Developmental Perspective on Cognitive Science (Cambridge, MA: MIT Press).
4.
Tomasello, M., Kruger, A.C. & Ratner, H.H. ( 1993). Cultural learning. Behavioral and Brain Sciences, 16, 495-552.
5.
Tomasello, M. & Camaioni, L. (1995). A comparison of the gestural communication of apes and human infants, Submitted for publication.
