Παραπομπή σε μορφή APA (7η εκδ.)

Illingworth, R. S. (1979). The normal child: Some problems of the early years and their treatment (7th edition.). Churchill Livingstone.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 7th edition. Edinburgh: Churchill Livingstone, 1979.

Παραπομπή σε μορφή MLA (8th εκδ.)

Illingworth, Ronald S. The Normal Child: Some Problems of the Early Years and Their Treatment. 7th edition. Churchill Livingstone, 1979.