Style de citation APA

Illingworth, R. S. (1953). The normal child: Some problems of the early years and their treatment (9.).

Style de citation Chicago

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 9. Edinburgh, Churchiil Living Stone, 1953.

Style de citation MLA

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 9. 1953.