APA (7th ed.) Citation

Welsh, R. L., & Blasch, B. B. (1980). Foundations of orientation and mobility. American Foundation for the Blind.

Chicago Style (17th ed.) Citation

Welsh, Richard L., and Bruce B. Blasch. Foundations of Orientation and Mobility. New York, N.Y.: American Foundation for the Blind, 1980.

MLA (9th ed.) Citation

Welsh, Richard L., and Bruce B. Blasch. Foundations of Orientation and Mobility. American Foundation for the Blind, 1980.