Ore, O. (1948). Number theory and its history. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOre, Oystein. Number Theory and Its History. Nueva York: McGraw-Hill, 1948.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOre, Oystein. Number Theory and Its History. McGraw-Hill, 1948.
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