APA (7th ed.) Citation

Hadfield, J. A. (1969). Childhood and Adolescence. Penguin Books.

Chicago Style (17th ed.) Citation

Hadfield, J. A. Childhood and Adolescence. Harmondsworth Middlesex (England): Penguin Books, 1969.

MLA (9th ed.) Citation

Hadfield, J. A. Childhood and Adolescence. Penguin Books, 1969.

Warning: These citations may not always be 100% accurate.