Stockton Naval War CollegeDiarsipkan 2017-08-22 di Wayback Machine., p.324 (retrieved 9 July 2017); Holwitt, pp.76-77; Zabecki, David T. "Doenitz: A Defense", pp.48-49, at Google BooksDiarsipkan 2018-05-13 di Wayback Machine. (retrieved 9 July 2017); Dönitz, Karl. Memoirs: Ten Years and Twenty Days; von der Poorten, Edward P. The German Navy in World War II (T. Y. Crowell, 1969); Milner, Marc. North Atlantic Run: the Royal Canadian Navy and the battle for the convoys (Vanwell Publishing, 2006)
Wilson, George Grafton (1930). "Armed Merchant Vessels and Submarines". The American Journal of International Law. 24 (2): 337–339. doi:10.2307/2189406. JSTOR2189406.Parameter |s2cid= yang tidak diketahui akan diabaikan (bantuan)
Wilson, George Grafton (1930). "Armed Merchant Vessels and Submarines". The American Journal of International Law. 24 (2): 337–339. doi:10.2307/2189406. JSTOR2189406.Parameter |s2cid= yang tidak diketahui akan diabaikan (bantuan)
usnwc.edu
stockton.usnwc.edu
Stockton Naval War CollegeDiarsipkan 2017-08-22 di Wayback Machine., p.324 (retrieved 9 July 2017); Holwitt, pp.76-77; Zabecki, David T. "Doenitz: A Defense", pp.48-49, at Google BooksDiarsipkan 2018-05-13 di Wayback Machine. (retrieved 9 July 2017); Dönitz, Karl. Memoirs: Ten Years and Twenty Days; von der Poorten, Edward P. The German Navy in World War II (T. Y. Crowell, 1969); Milner, Marc. North Atlantic Run: the Royal Canadian Navy and the battle for the convoys (Vanwell Publishing, 2006)
Stockton Naval War CollegeDiarsipkan 2017-08-22 di Wayback Machine., p.324 (retrieved 9 July 2017); Holwitt, pp.76-77; Zabecki, David T. "Doenitz: A Defense", pp.48-49, at Google BooksDiarsipkan 2018-05-13 di Wayback Machine. (retrieved 9 July 2017); Dönitz, Karl. Memoirs: Ten Years and Twenty Days; von der Poorten, Edward P. The German Navy in World War II (T. Y. Crowell, 1969); Milner, Marc. North Atlantic Run: the Royal Canadian Navy and the battle for the convoys (Vanwell Publishing, 2006)