Jonathan ,Barnes. (2000). The Presmatic philosophers. Routledge.
Cita Chicago (17th ed.)Jonathan ,Barnes. The Presmatic Philosophers. Lamdım: Routledge, 2000.
Cita MLA (9th ed.)Jonathan ,Barnes. The Presmatic Philosophers. Routledge, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.