ILG, F. L., & AMES, L. B. (1965). School readiness: Behavior test used at the gesell institute. Harper and Row.

ILG, Frances L., and Louise Bates AMES. School Readiness: Behavior Test Used at the Gesell Institute. New York: Harper and Row, 1965.

ILG, Frances L., and Louise Bates AMES. School Readiness: Behavior Test Used at the Gesell Institute. Harper and Row, 1965.