Knight, C. (1999) Sex and Language as Pretend Play. In Robin Dunbar and Chris Knight and Camilla Power, editors, The Evolution of Culture, pages 228--247. Edinburgh University Press, Edinburgh.
Knight, C., (1999). Sex and language as pretend-play. In R. Dunbar, C. Knight and C. Power (Eds.), The Evolution of Culture (pp. 228-247). Edinburgh: Edinburgh University Press.