Cita APA (7a ed.)

Playfair, G. (1971). The punitive obsession: An unvarnished history of the English prison system. Gollancz.

Cita Chicago Style (17a ed.)

Playfair, Giles. The Punitive Obsession: An Unvarnished History of the English Prison System. London: Gollancz, 1971.

Cita MLA (9a ed.)

Playfair, Giles. The Punitive Obsession: An Unvarnished History of the English Prison System. Gollancz, 1971.