San Francisco History: The Barbary Coast
- Text of Herbert Asbury's 1933 informal history of the San Francisco underworld.
- http://www.sfgenealogy.com/sf/history/hbtbcidx.htm

Salon: Sex, Sin and the Gangs of San Francisco
- Gary Kamiya discusses The Barbary Coast, Herbert Asbury's informal history of the San Francisco underworld.
- http://dir.salon.com/story/books/feature/2002/12/20/asbury/index.html

The Wild Geese: Review of Herbert Asbury's "Gangs of New York"
- Patricia Jameson-Sammartano provides a detailed review of the informal underworld history.
- http://www.thewildgeese.com/pages/bkregony.html

Herbert Asbury: Wikipedia
- Biographical article on the author of The Gangs of New York and other informal histories of crime.
- http://en.wikipedia.org/wiki/Herbert_Asbury

Herbert Asbury
- Information on the author of Gangs of New York, his family and his other works.
- http://herbertasbury.com/