Cita APA (7a ed.)

Percy, S. V. (2007). Mercenaries: The history of a norm in international relations (1st published.). Oxford University Press.

Cita Chicago Style (17a ed.)

Percy, Sarah V. Mercenaries: The History of a Norm in International Relations. 1st published. Oxford [etc.]: Oxford University Press, 2007.

Cita MLA (9a ed.)

Percy, Sarah V. Mercenaries: The History of a Norm in International Relations. 1st published. Oxford University Press, 2007.