APA (7th ed.) Citation

Spector. (2002). At war, at sea: Naval warfare in the twentieth century. Penguin Books.

Chicago Style (17th ed.) Citation

Spector. At War, at Sea: Naval Warfare in the Twentieth Century. London: Penguin Books, 2002.

MLA (8th ed.) Citation

Spector. At War, at Sea: Naval Warfare in the Twentieth Century. Penguin Books, 2002.