APA (7th ed.) Citation

Illingworth, R. S. (1987). The normal child: Some problems of the early years and their treatment (9th ed.). Churchill Livingstone.

Chicago Style (17th ed.) Citation

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 9th ed. Edinburgh: Churchill Livingstone, 1987.

MLA (9th ed.) Citation

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 9th ed. Churchill Livingstone, 1987.