Martin, S. (2007). The United Nations and Private Security Companies: Responsibility in conflict. Universidad de Deusto = Deustuko Unibertsitatea: Instituto de Derechos Humanos Pedro Arrupe.
MLA aipamenaMartin, Steven. The United Nations and Private Security Companies: Responsibility in Conflict. Universidad de Deusto = Deustuko Unibertsitatea: Instituto de Derechos Humanos Pedro Arrupe, 2007.
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