University of London, Institute of Historical Research. (1987). Historical Research. Basil Blackwell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUniversity of London, Institute of Historical Research. Historical Research. Oxford, Inglaterra: Basil Blackwell, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUniversity of London, Institute of Historical Research. Historical Research. Basil Blackwell, 1987.
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