Cita APA (7a ed.)

Parker, K. J. (2019). Sixteen ways to defend a walled city (First edition.). Orbit.

Cita Chicago Style (17a ed.)

Parker, K. J. Sixteen Ways to Defend a Walled City. First edition. New York, NY: Orbit, 2019.

Cita MLA (8a ed.)

Parker, K. J. Sixteen Ways to Defend a Walled City. First edition. Orbit, 2019.

Precaución: Estas citas no son 100% exactas.