APA (7th ed.) Citation

Gesell, A. (1948). Studies in child development ([1st ed.].). Harper.

Chicago Style (17th ed.) Citation

Gesell, Arnold. Studies in Child Development. [1st ed.]. New York: Harper, 1948.

MLA (9th ed.) Citation

Gesell, Arnold. Studies in Child Development. [1st ed.]. Harper, 1948.