APA (7th ed.) Citation

Sigel, I. E., & Hooper, F. H. (1968). Logical thinking in children: Research based on Piaget's theory. Holt, Rinehart & Winston.

Chicago Style (17th ed.) Citation

Sigel, Irving E., and Frank H. Hooper. Logical Thinking in Children: Research Based on Piaget's Theory. New York: Holt, Rinehart & Winston, 1968.

MLA (9th ed.) Citation

Sigel, Irving E., and Frank H. Hooper. Logical Thinking in Children: Research Based on Piaget's Theory. Holt, Rinehart & Winston, 1968.