V. E. Tarrant，The U-Boat Offensive 1914-1945，Sterling Pub Co Inc．2000 ISBN: 185409520X
Robert M. Grant，U-Boat Hunters: Code Breakers, Divers and the Defeat of the U-Boats 1914-1918 Naval Inst Pr．2004 ISBN: 1591148898
I. F. W. Beckett and Ian F. W. Beckett ，The First World War: The Essential Guide to Sources in the Uk National Archives，Casemate Pub，2002 ISBN: 1903365414
