Cita APA (7th ed.)
Duffy, J. P. (2001). Hitler's secret pirate fleet: The deadliest ships of World War II. Praeger.
Cita Chicago (17th ed.)
Duffy, James P. Hitler's Secret Pirate Fleet: The Deadliest Ships of World War II. Westport, Conn.: Praeger, 2001.
Cita MLA (9th ed.)
Duffy, James P. Hitler's Secret Pirate Fleet: The Deadliest Ships of World War II. Praeger, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.