O'Gordon, G. (1968). Modern trends in mental health and subnormality. Butterworths.
Lua i Stíl Chicago (17ú heag.)O'Gordon, Gerald. Modern Trends in Mental Health and Subnormality. London: Butterworths, 1968.
Lua MLA (9ú heag.)O'Gordon, Gerald. Modern Trends in Mental Health and Subnormality. Butterworths, 1968.
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