Hoffman, M. A. (1979). Egypt before the pharaohs: The prehistoric foundations of Egyptian civilization. Ark Paperbacks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHoffman, Michael A. Egypt Before the Pharaohs: The Prehistoric Foundations of Egyptian Civilization. London: Ark Paperbacks, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHoffman, Michael A. Egypt Before the Pharaohs: The Prehistoric Foundations of Egyptian Civilization. Ark Paperbacks, 1979.
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