Books,+ebooks,+reference

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Gifford, Clive. //Gangs//. London: Evans Brothers Limited, 2006. //Google Books//. Web. 9 May 2011. .

Cummings, Scott, and Daniel J. Monti. //Gangs: the origins and impact of// //contempary youth gangs in the United States//. New York: n.p., 1993. //Google Books//. Web. 9 May 2011. .