ebrary, Inc, & Waterfield, R. (2000). The first philosophers: The presocratics and sophists. Oxford University Press.
Čikaški stil citiranja (17. izdanje)ebrary, Inc, i Robin Waterfield. The First Philosophers: The Presocratics and Sophists. Oxford ; New York: Oxford University Press, 2000.
MLA način citiranja (9. izdanje)ebrary, Inc, i Robin Waterfield. The First Philosophers: The Presocratics and Sophists. Oxford University Press, 2000.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.