Havil, A. (2002). The spy who stayed out in the cold: The secret life of FBI double agent Robert Hanssen. St. Martin's Press.
Citazione stile Chigago Style (17a edizione)Havil, Adrian. The Spy Who Stayed Out in the Cold: The Secret Life of FBI Double Agent Robert Hanssen. New York, NY: St. Martin's Press, 2002.
Citatione MLA (9a ed.)Havil, Adrian. The Spy Who Stayed Out in the Cold: The Secret Life of FBI Double Agent Robert Hanssen. St. Martin's Press, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.