1. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (DSM5), (5th ed.). Washington, DC: APA.
2. Brookman, F. (2000). Dying for control: Men, murder and sub-lethal violence in England and Wales. Unpublished Ph.D. Thesis, Cardiff University.
3. Brookman, F. (2005). Understanding homicide. London and Los Angeles: Sage.
4. Federal Bureau of Investigation. (2015). United States, 2014 Uniform Crime Reports Homicide Data ‘Expanded Homicide Data, Table 2, Murder Victims by Age, Sex, Race and Ethnicity, 2014’ https://ucr.fbi.gov/crime-in-the-u.s/2014/crime-in-the-u.s.-2014/offenses-known-to-law-enforcement/expanded-homicide
5. Fox, J. A., & Levin, J. (2011). Extreme Killing: Understanding Serial and Mass Murder. Thousand Oaks, CA: Sage.