Gesell, A. L. (1925). The mental growth of the pre-school child: A psychological outline of normal development from birth to the sixth year, including a system of developmental diagnosis. Macmillan.

Gesell, Arnold Lucius. The Mental Growth of the Pre-school Child: A Psychological Outline of Normal Development from Birth to the Sixth Year, Including a System of Developmental Diagnosis. New York: Macmillan, 1925.

Gesell, Arnold Lucius. The Mental Growth of the Pre-school Child: A Psychological Outline of Normal Development from Birth to the Sixth Year, Including a System of Developmental Diagnosis. Macmillan, 1925.