APA (7th ed.) Citation

Valentine, C. W. (1956). The normal child and some of his abnormalities: A general introduction to the psychology of childhood. Penguin Books.

Chicago Style (17th ed.) Citation

Valentine, C. W. The Normal Child and Some of His Abnormalities: A General Introduction to the Psychology of Childhood. Harmondsworth, Middlesex: Penguin Books, 1956.

MLA (9th ed.) Citation

Valentine, C. W. The Normal Child and Some of His Abnormalities: A General Introduction to the Psychology of Childhood. Penguin Books, 1956.