Cita APA (7a ed.)

Whitfield, D., & Whitfield, R. G. (1991). The state of the prisons - 200 years on. Routledge.

Cita Chicago Style (17a ed.)

Whitfield, Dick, y Richard G. Whitfield. The State of the Prisons - 200 Years on. London [u.a.]: Routledge, 1991.

Cita MLA (9a ed.)

Whitfield, Dick, y Richard G. Whitfield. The State of the Prisons - 200 Years on. Routledge, 1991.