Percy, S. (2007). Mercenaries: The History of a Norm in International Relations. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.
Citatione MLA (9a ed.)Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.