Heaton-Ward, W. A. (1975). Mental subnormality: Subnormality and severe subnormality (4th ed.). J. Wright.
Citazione stile Chigago Style (17a edizione)Heaton-Ward, W. Alan. Mental Subnormality: Subnormality and Severe Subnormality. 4th ed. Bristol: J. Wright, 1975.
Citatione MLA (8a ed.)Heaton-Ward, W. Alan. Mental Subnormality: Subnormality and Severe Subnormality. 4th ed. J. Wright, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.