1. National Conference of State Legislatures State medical marijuana laws 2013 http://www.ncsl.org/research/health/state-medical-marijuana-laws.aspx
2. Federal Bureau of Investigation Crime in the United States: 2011 http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/persons-arrested/persons-arrested
3. The legalization of recreational marijuana: how likely is the worst-case scenario?;Anderson;J Policy Anal Manage.,2013
4. Keller B. How to legalize pot New York Times 2013