APA (7th ed.) Citation

Montessori, M., & M. Joseph Costelloe. (1972). The Discovery of the Child. Random House Publishing.

Chicago Style (17th ed.) Citation

Montessori, Maria, and M. Joseph Costelloe. The Discovery of the Child. New York: Random House Publishing, 1972.

MLA (9th ed.) Citation

Montessori, Maria, and M. Joseph Costelloe. The Discovery of the Child. Random House Publishing, 1972.