APA (7th ed.) Citation

Roskill, S. W. (1956). The war at sea, 1939-1945 / by S.W. Roskill. H.M.S.O..

Chicago Style (17th ed.) Citation

Roskill, S. W. The War at Sea, 1939-1945 / by S.W. Roskill. H.M.S.O., 1956.

MLA (9th ed.) Citation

Roskill, S. W. The War at Sea, 1939-1945 / by S.W. Roskill. H.M.S.O., 1956.

Warning: These citations may not always be 100% accurate.