De Waard, J. (1999). The Private Security Industry in International Perspective. European Journal on Criminal Policy and Research. 7, 143-174.
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Waard, Jaap De (1999): "The Private Security Industry in International Perspective", European Journal on Criminal Policy and Research, 7 (2), 143-174.
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Waard, J. D. (1999). The Private Security Industry in International Perspective". European Journal on Criminal Policy and Research, 7(2), pp. 143-174.
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