APA (7th ed.) Citation

Montessori, M., & Costelloe, J. (1988). The discovery of the child. Clio Press.

Chicago Style (17th ed.) Citation

Montessori, Maria, and Joseph Costelloe. The Discovery of the Child. Oxford, Eng: Clio Press, 1988.

MLA (9th ed.) Citation

Montessori, Maria, and Joseph Costelloe. The Discovery of the Child. Clio Press, 1988.