The Roaring Twenties Biographies. Farmington Hills: Thomson Gale, 2006. Print

Wikipedia. Wikimedia Foundation, n.d. Web. 06 Nov. 2013.

"History Files - Al Capone." History Files - Al Capone. N.p., n.d. Web. 06 Nov. 2013.

Al Capone and the Internal Revenue Service: State-sanctioned Criminology of Organized Crime - Springer." Al Capone and the Internal Revenue Service: State-sanctioned Criminology of Organized Crime - Springer. N.p., 01 Jan. 1992. Web. 06 Nov. 2013.