About Billy the Kid
- A comprehensive site on the true life of Billy the Kid, alias William H. Bonney. Includes a biography, comparing facts with the myths and the Young Guns films, trivia facts, discussion board, quiz, and photographs.
- http://www.aboutbillythekid.com/

The Outlaw and the Politician
- Story of the outlaws, including Billy the Kid, in Las Vegas, New Mexico.
- http://edge.net/~dphillip/Outlaw.html

Billy the Kid
- Manuscript of an interview of Edith Crawford on May 10, 1937, for the WPA Writers' Project. Ms Crawford was then 85 years old.
- http://lcweb2.loc.gov/wpa/19030911.html

Billy the Kid Outlaw Gang
- History of Billy the Kid and of Pat Garrett including the legend, friends and enemies and facts among other information.
- http://www.nmia.com/~btkog/