APA (7th ed.) Citation

Roskill, S. W. (1957). The war at sea 1939-1945: 1 The defensive. The war at sea 1939-1945.

Chicago Style (17th ed.) Citation

Roskill, Stephen Wentworth. "The War at Sea 1939-1945: 1 The Defensive." The War at Sea 1939-1945 1957.

MLA (8th ed.) Citation

Roskill, Stephen Wentworth. "The War at Sea 1939-1945: 1 The Defensive." The War at Sea 1939-1945, 1957.

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