Offley, E., & Adams, J. (2011). Turning the tide: How a small band of allied sailors defeated the u-boats and won the battle of the atlantic (Unabridged.). HighBridge Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Offley, Ed, و James Adams. Turning the Tide: How a Small Band of Allied Sailors Defeated the U-boats and Won the Battle of the Atlantic. Unabridged. Prince Frederick: HighBridge Audio, 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Offley, Ed, و James Adams. Turning the Tide: How a Small Band of Allied Sailors Defeated the U-boats and Won the Battle of the Atlantic. Unabridged. HighBridge Audio, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.