APA (7th ed.) Citation

Wehmeyer, M. L., & Patton, J. R. (2000). Mental retardation in the 21st century. Pro-Ed.

Chicago Style (17th ed.) Citation

Wehmeyer, Michael L., and James R. Patton. Mental Retardation in the 21st Century. Austin: Pro-Ed, 2000.

MLA (9th ed.) Citation

Wehmeyer, Michael L., and James R. Patton. Mental Retardation in the 21st Century. Pro-Ed, 2000.