Buchanan, M.L. (1995). The home play of toddlers with and without disabilities. Unpublished doctoral dissertation, University of Washington , Seattle.
2.
Christie, J., & Johnson, J. (1983). The role of play in social-intellectual development . Review of Educational Research, 53, 93-115.
3.
Dunn, J. (1986). Pretend play in the family. In A. W Gottfried & C. Caldwell (Eds.), Play interactions: The role of toys and parental involvement in children's development (pp. 79-87). Lexington, MA : Lexington Books.
4.
Fenson, L., Kagan, J., Kearsley, R.B., & Zelazo, E.R. (1976). The developmental progression of manipulative play in the first two years. Child Development, 47, 232-235.
5.
Fewell, R., & Kiminski, R. (1988). Play skills development and instruction for young children with handicaps. In S. Odom & M. Karnes (Eds.), Early intervention for infants and children with handicaps: An empirical base (pp. 141-158). Baltimore: Paul H. Brookes.
6.
Jones, E., & Reynolds, G. (1992). The play's the thing. New York : Teachers College Press.
7.
Lewis, M. (1979). The social determination of play. In B. B. Sutton-Smith (Ed.), Play and learning (pp. 23-33New York: Gardner.
8.
Malone, D., & Stoneman, Z. (1990). Cognitive play of mentally retarded preschoolers: Observations in the home and school. American Journal on Mental Retardation, 94(5), 475-487.
9.
Malone, D., Stoneman, Z., & Langone, J. (1994). Contextual variation of correspondences among measures of play and developmental level of preschool children. Journal of Early Intervention, 18(2), 199-215.
10.
Parten, M. (1932). Social participation among preschool children . Journal of Abnormal and Social Psychology, 27, 243-269.
11.
Piaget, J. (1962). Play, dreams and imitation in childhood. New York: Norton.
12.
Rubin, K.H., Fein, G.G., & Vandenberg, B. (1983). Play. In E. M. Heatherington (Ed.), Carmichael's manual of child psychology (Vol. N): Socialization, personality and social development (pp. 693-774). New York: Wiley.
13.
Whaley, K. (1990). The emergence of social play in infancy: A proposed developmental sequence of infant-adult social play. Early Childhood Research Quarterly, 5,347-358.
