1. Aufenanger, H. (1976). Children's games and entertainments among the Kumngo tribe in Central New Guinea. In B. Sutton-Smith (Ed.),A children's game anthology (pp. 575–584). New York: Arno Press.
2. Berman, E. H. (1975).African reaction to missionary education. New York: Teachers College Press.
3. Bruner, J. (1986). Play, thought and language.Prospects XVI, 77–83.
4. Chepyator-Thomson, J. R. (1986).The games of Keiyo children in Kenya: Past and present. Unpublished master's thesis, University of Wisconsin.
5. Christie, J. F., & Johnsen, E. P. (1983). The role of play in social-intellectual development.Review of Educational Research 53(1), 93–115.