REFERENCES


Evans, R. I., & Piaget, J. (1973) . The Man and His Ideas. NY: E. P. Dutton & Co, Inc.

Feldman, R. S. (1989). Understanding Psychology. NY: McGraw-HillBook Co.

Ginsburg, H. P., & Opper, S. (1988). Piaget's Theory ofIntellectual Development. 3rd Ed. N.J.: Prentice Hall.

Piaget, J. (1960). The Child's Conception of The World. N.J.:Littlefield, Adams & CO.

Piaget, J. (1952). The Origins of Intellegence in Children. N.Y.:The Norton Library, WW Norton & Co, Inc.

Pulaski, M. A. S. (1980). Understanding Piaget. N.Y.: Harper &Row, Publishers.

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