Cita APA (7a ed.)

Montessori, M., & Costelloe, M. J. (1976). The discovery of the child (5th printing.). Ballantine Books.

Cita Chicago Style (17a ed.)

Montessori, Maria, y M. Joseph Costelloe. The Discovery of the Child. 5th printing. New York: Ballantine Books, 1976.

Cita MLA (9a ed.)

Montessori, Maria, y M. Joseph Costelloe. The Discovery of the Child. 5th printing. Ballantine Books, 1976.