• For more information about the link between violent video games and aggression:

American Psychological Association Studies

• For the 2003 crime statistics:

FBI 2003 Crime Statistics

• For more information about some studies conducted by college professors:

NBC News

PBS.org news article

• To learn more about how the military uses video games:

How the Military uses video games

• To read a full list of the numerical amount of crimes committed from 1960 to 2014:

United States crime rates 1960-2014