^Griffiths, Marti, Steven C. Roach and M. Scott Solomon (2009), Fifty Key Thinkers in International Relations, Second Edition. Routledge. (ردمك 0-415-77571-X). p. 178.
^Gill, Stephen (2003). Power and Resistance in the New World Order. Macmillan-Palgrave. (ردمك 1-4039-0390-5). p. 2.
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