APA (7th ed.) Citation

Gelman, R., & Gallistel, C. R. (1978). The child's understanding of number. Harvard University Press.

Chicago Style (17th ed.) Citation

Gelman, Rochel, and C. R. Gallistel. The Child's Understanding of Number. Cambridge (Massachusetts) [etc.]: Harvard University Press, 1978.

MLA (9th ed.) Citation

Gelman, Rochel, and C. R. Gallistel. The Child's Understanding of Number. Harvard University Press, 1978.