Sources:
- https://www.fbi.gov/history/famous-cases/willie-sutton
- https://www.britannica.com/biography/Willie-Sutton
- http://m.bankingexchange.com/blogs/reporter-s-notebook/item/256-the-unexpurgated-search-for-willie-sutton
- https://www.thefamouspeople.com/profiles/willie-sutton-3413.php
- https://alchetron.com/Willie-Sutton