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"Al Capone." The Federal Bureau of Investigation. FBI, n.d. Web. 14 May 2011. <http://www.fbi.gov/about-us/history/famous-cases/al-capone>.
Buchanan, Edna. "LUCKY LUCIANO: Criminal Mastermind." Time Magazine 07 Dec 1998: n. pag. Web. 14 May 2011. <http://www.time.com/time/magazine/article/0%2C9171%2C989779%2C00.html>.
"George "Machine Gun" Kelly." The Federal Bureau of Investigation. FBI, n.d. Web. 14 May 2011. <http://www.fbi.gov/about-us/history/famous-cases/machine-gun-kelly>.
"Italian Organized Crime." The Federal Bureau of Investigation. FBI, n.d. Web. 14 May 2011. <http://www.fbi.gov/about-us/investigate/organizedcrime/italian_mafia>.
Keefe, Rose. "Biography." BugsMoran. Cumberland House Publishing, 2004. Web. 14 May 2011. <http://www.bugsmoran.net/biography.html>.
"Machine Gun Kelly." Alcatraz History. USA Today, n.d. Web. 14 May 2011. < http://www.alcatrazhistory.com/mgk.htm >.