APA (7th ed.) Citation

Cegelka, P. T., & Prehm, H. J. (1982). Mental retardation: From categories to people. Merrill.

Chicago Style (17th ed.) Citation

Cegelka, Patricia T., and Herbert J. Prehm. Mental Retardation: From Categories to People. Columbus: Merrill, 1982.

MLA (9th ed.) Citation

Cegelka, Patricia T., and Herbert J. Prehm. Mental Retardation: From Categories to People. Merrill, 1982.