1. Baker, A. (2007, December 27). City is doubling police program to reduce crime. The New York Times.
2. Bayley, D. (1996). Measuring overall effectiveness. In L. T. Hoover (ed.), Quantifying quality in policing (pp. 37–54). Washington, DC: Police Executive Research Forum.
3. Blumstein, A. & Wallman, J. (Eds.). (2000). The crime drop in America. New York, NY: Cambridge University Press.