Darwin, J. (2013). Unfinished empire: The global expansion of Britain (First U.S. edition.). Bloomsbury Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDarwin, John. Unfinished Empire: The Global Expansion of Britain. First U.S. edition. New York: Bloomsbury Press, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDarwin, John. Unfinished Empire: The Global Expansion of Britain. First U.S. edition. Bloomsbury Press, 2013.
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