West, W. M., & West, R. (1934). The story of man's early progress (New ed.). Allyn and Bacon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWest, Willis Mason, और Ruth West. The Story of Man's Early Progress. New ed. Boston: Allyn and Bacon, 1934.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWest, Willis Mason, और Ruth West. The Story of Man's Early Progress. New ed. Allyn and Bacon, 1934.
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