Richards, S. C. (2015). The Marion Experiment: Long-term solitary confinement and the supermax movement. Southern Illinois University Press.

Richards, Stephen C. The Marion Experiment: Long-term Solitary Confinement and the Supermax Movement. Carbondale, Illinois: Southern Illinois University Press, 2015.

Richards, Stephen C. The Marion Experiment: Long-term Solitary Confinement and the Supermax Movement. Southern Illinois University Press, 2015.