Levinson, B., & Reese, H. W. (1967). Patterns of discrimination learning set in preschool children, fifth- graders, college freshmen and the aged. University of Chicago Press for the Society for Research in Child Development.

Levinson, Billey, and Hayne Waring Reese. Patterns of Discrimination Learning Set in Preschool Children, Fifth- Graders, College Freshmen and the Aged. Chicago: University of Chicago Press for the Society for Research in Child Development, 1967.

Levinson, Billey, and Hayne Waring Reese. Patterns of Discrimination Learning Set in Preschool Children, Fifth- Graders, College Freshmen and the Aged. University of Chicago Press for the Society for Research in Child Development, 1967.