Douglas, D. C. (1964). William the Conqueror: The Norman impact upon England. University of California Press.
Chicago Style (17. basım) AtıfDouglas, David Charles. William the Conqueror: The Norman Impact upon England. Berkeley: University of California Press, 1964.
MLA (9th ed.) AtıfDouglas, David Charles. William the Conqueror: The Norman Impact upon England. University of California Press, 1964.
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