Cita APA (7a ed.)

Fields, N., & Dennis, P. (2008). The walls of Rome. Osprey.

Cita Chicago Style (17a ed.)

Fields, Nic, y Peter Dennis. The Walls of Rome. Oxford: Osprey, 2008.

Cita MLA (9a ed.)

Fields, Nic, y Peter Dennis. The Walls of Rome. Osprey, 2008.