Offley, E., & Williams, J. (2011). Turning the tide: How a small band of Allied sailors defeated the U-boats and won the Battle of the Atlantic. Basic Books.

Offley, Edward, and Jeff Williams. Turning the Tide: How a Small Band of Allied Sailors Defeated the U-boats and Won the Battle of the Atlantic. New York, New York ; Philadelphia, Pennsylvania: Basic Books, 2011.

Offley, Edward, and Jeff Williams. Turning the Tide: How a Small Band of Allied Sailors Defeated the U-boats and Won the Battle of the Atlantic. Basic Books, 2011.