International Association for the Scientific Study of Mental Deficiency. Congress, World Health Organization, & Fraser, W. I. (1990). Key issues in mental retardation research: Proceedings of the 8th World Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD) : Dublin, Ireland, 21-25 Agust 1988. Routledge.
Chicago Style (17. basım) AtıfInternational Association for the Scientific Study of Mental Deficiency. Congress, World Health Organization, ve William I. Fraser. Key Issues in Mental Retardation Research: Proceedings of the 8th World Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD) : Dublin, Ireland, 21-25 Agust 1988. London: Routledge, 1990.
MLA (9th ed.) AtıfInternational Association for the Scientific Study of Mental Deficiency. Congress, et al. Key Issues in Mental Retardation Research: Proceedings of the 8th World Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD) : Dublin, Ireland, 21-25 Agust 1988. Routledge, 1990.