Wikipedia: Louis Buchalter
- Biography of the New York garment industry racketeer and Murder Inc. boss who was executed in the electric chair in 1944.
- http://en.wikipedia.org/wiki/Louis_Buchalter

LIFE Books: At Home With Mickey Cohen
- Photo gallery and brief interview from "Mobsters and Gangsters" shows Cohen and wife LaVonne at their Brentwood, California, home in the 1950s.
- http://www.life.com/Life/lifebooks/mobsters/gallery2/

Wikipedia: Mickey Cohen
- Biography of the California gambler.
- http://en.wikipedia.org/wiki/Mickey_Cohen

Crime Library: All About Mickey Cohen
- Writer Mark Gribben's biographical essay on the New York street tough who became a California gambling czar.
- http://www.crimelibrary.com/gangsters_outlaws/mob_bosses/mickey_cohen/

Wikipedia: The Purple Gang
- Article describes the history of the Detroit bootlegging gang.
- http://en.wikipedia.org/wiki/The_Purple_Gang

Wikipedia: Dutch Schultz
- Biography of the New York gangster.
- http://en.wikipedia.org/wiki/Dutch_Schultz

Wikipedia: Meyer Lansky
- Biography of the New York gangster.
- http://en.wikipedia.org/wiki/Meyer_Lansky

Wikipedia: Bugsy Siegel
- Biography of the gangster. Topics include Siegel's underworld business ventures in Los Angeles and Las Vegas (Flamingo Hotel), and his 1947 assassination.
- http://en.wikipedia.org/wiki/Bugsy_Siegel

Wikipedia: Arnold Rothstein
- Biography of the New York gambler and racketeer. Topics include the 1919 "Black Sox" World Series scandal, bootlegging activity and Rothstein's 1928 murder.
- http://en.wikipedia.org/wiki/Arnold_Rothstein

FBI: Freedom of Information Act: Benjamin 'Bugsy' Siegel
- Bureau files on New York/California/Las Vegas racketeer Siegel contain 2,421 pages.
- http://foia.fbi.gov/foiaindex/siege.htm

Crime Library: Arnold Rothstein
- Writer Allan May presents a biography of New York mobster, gambler and bootlegger Arnold Rothstein.
- http://www.crimelibrary.com/gangsters_outlaws/mob_bosses/rothstein/index_1.html

Crime Library: Meyer Lansky: Mastermind of the Mob
- Writer Mark Gribben states, if there was a golden age of organized crime, it began with Lansky.
- http://www.crimelibrary.com/gangsters/meyer/main.htm

Crime Library: Dutch Schultz: Beer Baron of the Bronx
- Writer Allen May delivers a biography of Arthur "Dutch Schultz" Flegenheimer.
- http://www.crimelibrary.com/gangsters/schultz/

Crime Library: Bootlegger's Paradise
- Writer Mark Gribben's feature article on the Jewish Purple Gang of Prohibition Era Detroit; photos and bibliography.
- http://www.crimelibrary.com/gangsters/purple/purplemain.htm

Bugsysiegel.net
- Website examines "the man who invented Las Vegas," Benjamin Bugsy Siegel. Features include biography, quotes, photos, official documents, web links, information and photos of the Flamingo Hotel.
- http://www.bugsysiegel.net