Isaac, J. P. (1971). Factors in the ruin of antiquity: A criticism of ancient civilization. Printed by Bryant Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIsaac, James Paton. Factors in the Ruin of Antiquity: A Criticism of Ancient Civilization. [S.l: Printed by Bryant Press, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIsaac, James Paton. Factors in the Ruin of Antiquity: A Criticism of Ancient Civilization. Printed by Bryant Press, 1971.
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