Cita APA (7a ed.)

Bisson, T. N. (2009). The Crisis of the twelfth century: Power, lordship, and the origins of european government. Princeton University.

Cita Chicago Style (17a ed.)

Bisson, Thomas N. The Crisis of the Twelfth Century: Power, Lordship, and the Origins of European Government. Princeton: Princeton University, 2009.

Cita MLA (9a ed.)

Bisson, Thomas N. The Crisis of the Twelfth Century: Power, Lordship, and the Origins of European Government. Princeton University, 2009.