Offer, A. (1989). Economic Interpretation of War: The German Submarine Campaign, 1915-18.
芝加哥风格引文Offer, A. Economic Interpretation of War: The German Submarine Campaign, 1915-18. 1989.
MLA引文Offer, A. Economic Interpretation of War: The German Submarine Campaign, 1915-18. 1989.
警告：这些引文格式不一定是100％准确.