Kippenhahn, R. (1999). Code breaking: A history and exploration. Universities press.
Chicago Edition CitationKippenhahn, Rudolf. Code Breaking: A History and Exploration. Hyderabad: Universities press, 1999.
Cita MLAKippenhahn, Rudolf. Code Breaking: A History and Exploration. Universities press, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.