ebrary, Inc, & Waterfield, R. (2000). The first philosophers: The presocratics and sophists. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, और Robin Waterfield. The First Philosophers: The Presocratics and Sophists. Oxford ; New York: Oxford University Press, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, और Robin Waterfield. The First Philosophers: The Presocratics and Sophists. Oxford University Press, 2000.
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