Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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