APA (7th ed.) Citation

Dybward, R. F. (1989). International directory of mental retardation resources (3nd edition.). U.S. Department of Health and Human Services.

Chicago Style (17th ed.) Citation

Dybward, Rosemary F. International Directory of Mental Retardation Resources. 3nd edition. Washington: U.S. Department of Health and Human Services, 1989.

MLA (8th ed.) Citation

Dybward, Rosemary F. International Directory of Mental Retardation Resources. 3nd edition. U.S. Department of Health and Human Services, 1989.

Warning: These citations may not always be 100% accurate.