Barraclough, G. (1955). History in a changing world. University of Oklahoma Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBarraclough, Geoffrey. History in a Changing World. Norman: University of Oklahoma Press, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBarraclough, Geoffrey. History in a Changing World. University of Oklahoma Press, 1955.
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