Knight, C. (2000) Play as a precursor of phonology and syntax. In Chris Knight and James R. Hurford and Michael Studdert-Kennedy, editors, The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form . Cambridge: Cambridge University Press.

Knight, C. (2000) Play as a precursor of phonology and syntax. In Chris Knight and James R. Hurford and Michael Studdert-Kennedy, editors, The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form. Cambridge: Cambridge University Press.

2008	-	Unravelling Digital Infinity - Knight,Power	::
		Knight, C. (2000). Play as precursor of phonology and syntax. In Knight, C., M. Studdert-Kennedy and J. R. Hurford (eds), The Evolutionary Emergence of Language. Social function and the origins of linguistic form. Cambridge: Cambridge University Press, pp. 99-119.
2008	-	Language co-evolved with the rule of law - Knight	::
		Knight C (2000) Play as precursor of phonology and syntax. In: Knight CD, Studdert-Kennedy M, Hurford JR (eds) The evolutionary emergence of language: social function and the origins of linguistic form. Cambridge University Press, Cambridge, pp 99-119
2003	-	The Language Mosaic and its Evolution - Hurford	::	7
		----- 2000. Play as precursor of phonology and syntax. In C.Knight, M.Studdert-Kennedy, and J.R. Hurford (Eds.), The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form, Cambridge: Cambridge University Press. 99-119.