APA (7th ed.) Citation

Illingworth, R. S. (1972). The development of the infant and young child: Normal and abnormal (5th ed.). Williams and Wilkins.

Chicago Style (17th ed.) Citation

Illingworth, Ronald S. The Development of the Infant and Young Child: Normal and Abnormal. 5th ed. Baltimore: Williams and Wilkins, 1972.

MLA (8th ed.) Citation

Illingworth, Ronald S. The Development of the Infant and Young Child: Normal and Abnormal. 5th ed. Williams and Wilkins, 1972.