O'Gordon, G. (1968). Modern trends in mental health and subnormality. Butterworths.
Chicago-referens (17:e uppl.)O'Gordon, Gerald. Modern Trends in Mental Health and Subnormality. London: Butterworths, 1968.
MLA-referens (9:e uppl.)O'Gordon, Gerald. Modern Trends in Mental Health and Subnormality. Butterworths, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.