References
- "FBI Investigation File 76-26295". Federal Bureau of Investigation. Retrieved 2008-12-07.
- Zimmerman, Keith; Zimmerman, Kent; Hyneman, Jamie; Savage, Adam; Rees, Peter (2005). Mythbusters: The Explosive Truth Behind 30 of the Most Perplexing Urban Legends of All Time. Simon and Schuster. ISBN 978-1-4169-0929-3.
Read more about this topic: June 1962 Alcatraz Escape