Lieut. Otto Weddigen's Account of the U-9 Submarine Attack. Great Neck Publishing.
Cita Chicago (17th ed.)Lieut. Otto Weddigen's Account of the U-9 Submarine Attack. Great Neck Publishing.
Cita MLA (8th ed.)Lieut. Otto Weddigen's Account of the U-9 Submarine Attack. Great Neck Publishing.
Atenció: Aquestes cites poden no estar 100% correctes.