APA (7th ed.) Citation

Illingworth, R. S. (1991). The normal child: Some problems of the early years and their treatment (10th ed.). Churchill Livingstone.

Chicago Style (17th ed.) Citation

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 10th ed. New York: Churchill Livingstone, 1991.

MLA (9th ed.) Citation

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 10th ed. Churchill Livingstone, 1991.