1Feuerstein, R., Rand, Y., Hoffman, M. &,.Miller, M. (1980). Instrumental enrichment : An intervention programme for cognitive modifiability. Baltimore, MD: University Park Press.
2Osborn, A. F. (1963). Applied imagination. Charles Scribner's Sons. New York.
3De Bono, E. (1987). CoRT Thinking Program:Workcards and teachers, notes. Chicago: Science Research Associates.
4Buzan, T. (1984). Use Your Perfect Memory. N. Y. :E. P. Dutton.
5Williams, F. E. (1972). A Total Creativity Program for Individualizing and Humanizing the Learning Process.Englewood Cliffs, N J: Edueational Technology Publications.