Keenan, E.O. (1977). Making it last repetition in children's discourse . In S. Ervin-Tripp & C. Mitchell-Kernan (eds), Child Discourse (New York: Academic Press).
2.
Ninio, A. & Bruner, J. (1978). The achievement and antecedents of labelling. Journal of Child Language, 5, 1-15.