References
- Arnheim, R. Art and Visual Perception. Berkeley Calif: University of California Press. 2nd Edition. 1975.
- Bassett, E. In “The Child's Representation of the World” (Ed. Butterworth, G.) Plenum Press, New York. 1977.
- Freeman, N. Process and product in children's drawing. Perception. Vol. 1, 1972 pp. 123–140.
- Freeman, N. In The Child's Representation of the World. (Ed. Butterworth, G.) New York. Plenum Press. 1977.
- Freeman, N. Children's drawings: cognitive aspects. Journal of Child Psychology and Psychiatry. Vol. 17, 1976, pp. 345–350.
- Freeman, N. Drawing Conclusions. New Behaviour. 1975. b.3 p. 17–19.
- Golomb, C. Young Children's Sculpture and Drawing. Cambridge, Mass. Harvard University Press. 1974.
- Goodnow, J. Children's Drawing. London. Open Books. 1977.
- Harris, D. Children's Drawing as Measures of Intellectual Maturity. New York. Harcourt, Brace and World. 1963.
- Langer, S. Philosophy in a New Key. New York, Pelican. 1948.
- Langer, S. Problem of Art. Routledge & Keegan Paul. 1957.