Tuchman, B. W. (1996). The proud tower: A portrait of the world before the war, 1890-1914 (1st Ballantine Books ed.). Ballantine Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTuchman, Barbara W. The Proud Tower: A Portrait of the World Before the War, 1890-1914. 1st Ballantine Books ed. New York: Ballantine Books, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTuchman, Barbara W. The Proud Tower: A Portrait of the World Before the War, 1890-1914. 1st Ballantine Books ed. Ballantine Books, 1996.
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