Cita APA (7a ed.)

Percy, S. (2007). Mercenaries: The History of a Norm in International Relations. Oxford University Press.

Cita Chicago Style (17a ed.)

Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.

Cita MLA (9a ed.)

Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.