Sigel, I. E., & Hooper, F. H. (1968). Logical thinking in children: Research based on Piaget's theory. Holt, Rinehart & Winston.
Chicagoスタイル(17版)引用形式Sigel, Irving E., , Frank H. Hooper. Logical Thinking in Children: Research Based on Piaget's Theory. New York: Holt, Rinehart & Winston, 1968.
MLA(9版)引用形式Sigel, Irving E., , Frank H. Hooper. Logical Thinking in Children: Research Based on Piaget's Theory. Holt, Rinehart & Winston, 1968.
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