Gelman, R., & Gallistel, C. R. (1978). The child's understanding of number. Harvard University Press.
Chicago Style (17th ed.) CitationGelman, Rochel, and C. R. Gallistel. The Child's Understanding of Number. Cambridge (Massachusetts) [etc.]: Harvard University Press, 1978.
MLA (9th ed.) CitationGelman, Rochel, and C. R. Gallistel. The Child's Understanding of Number. Harvard University Press, 1978.
Warning: These citations may not always be 100% accurate.