Pascual-Leone, J., & Piaget, J. (1972). A theory of constructive operators: A neoPiagetian model of conservation and the problem of horizontal decalages. York University.
Chicago Style (17th ed.) CitationPascual-Leone, Juan, and Jean Piaget. A Theory of Constructive Operators: A NeoPiagetian Model of Conservation and the Problem of Horizontal Decalages. [York]: York University, 1972.
MLA (8th ed.) CitationPascual-Leone, Juan, and Jean Piaget. A Theory of Constructive Operators: A NeoPiagetian Model of Conservation and the Problem of Horizontal Decalages. York University, 1972.
Warning: These citations may not always be 100% accurate.