Offer, A. (1989). Economic Interpretation of War: The German Submarine Campaign, 1915-18.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOffer, A. Economic Interpretation of War: The German Submarine Campaign, 1915-18. 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOffer, A. Economic Interpretation of War: The German Submarine Campaign, 1915-18. 1989.
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