- & SPROTT, R. L. [. (1980). Age, learning ability, and intelligence. Van Nostrand Reinhold Co.

- and Richard L. [Ed.] SPROTT. Age, Learning Ability, and Intelligence. New York: Van Nostrand Reinhold Co, 1980.

- and Richard L. [Ed.] SPROTT. Age, Learning Ability, and Intelligence. Van Nostrand Reinhold Co, 1980.