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George L. Kelling & Catherine M. Coles, Fixing Broken Windows: Restoring Order And Reducing Crime In Our Communities (New York: Simon & Schuster, 1996), pp 143–144.
Christopher M. Donner, "Crime prevention", pp 390–395, in Wilbur R. Miller, ed, The Social History of Crime and Punishment in America: An Encyclopedia (Thousand Oaks CA, New Delhi, London: Sage Publications, 2012), p 393.
Jane E. Jeffrey, "Dramatic convergence in Times Square", por Phyllis R. Brown, Linda A. McMillin & Katharina M. Wilson, eds., Hrotsvit de Gandersheim: Contexts, Identities, Affinities, and Performances (Toronto: University of Toronto Press, 2004), pp 251–252
