APA aipamena

Hatwell, Y., & Stephens, B. (1985). Piagetian reasoning and the blind. American Foundation for the Blind.

Chicago Style aipamena

Hatwell, Yvette, and Beth Stephens. Piagetian Reasoning and the Blind. New York, N.Y.: American Foundation for the Blind, 1985.

MLA aipamena

Hatwell, Yvette, and Beth Stephens. Piagetian Reasoning and the Blind. American Foundation for the Blind, 1985.