A Review of the Definitions, Available Data Sources, and Paths Moving Forward
Strom, K., Berzofsky, M., Shook-Sa, B., Barrick, K., Daye, C., Horstmann, N., & Kinsey, S. (2010). Private Security Industry: A Review of the Definitions, Available Data Sources, and Paths Moving Forward. US Department of Justice, Bureau of Justice Statistics.
