Cita APA (7a ed.)

Hadfield, J. (1970). Childhood and adolescence. Penguin.

Cita Chicago Style (17a ed.)

Hadfield, J.A. Childhood and Adolescence. Harmondsworth (Milddlesex): Penguin, 1970.

Cita MLA (9a ed.)

Hadfield, J.A. Childhood and Adolescence. Penguin, 1970.