Percy, S. (2007). Mercenaries: The History of a Norm in International Relations. Oxford University Press.
Chicago-čujuhus (17. p.)Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.
MLA-čujuhus (9. p.)Percy, S. Mercenaries: The History of a Norm in International Relations. Oxford University Press, 2007.
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