APA (7 वां संस्करण) प्रशस्ति पत्र

University of London, Institute of Historical Research. (1987). Historical Research. Basil Blackwell.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

University of London, Institute of Historical Research. Historical Research. Oxford, Inglaterra: Basil Blackwell, 1987.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

University of London, Institute of Historical Research. Historical Research. Basil Blackwell, 1987.

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