Guthrie, W.K.C.
A history of Greek philosophy
Cambridge University Press, 1989
 Buku Teks SO
Burnet, John
Early Greek philosophy. / John Burnet
Meridian Books, 1957.
 Buku Teks SO
Blackson, Thomas A.
Ancient Greek philosophy : from the presocratics to the hellenistic philosophers
Wiley-Blackwell, 2011
 Buku Teks SO
A companion to early modern philosophy : balckwell companions to philosophy
Mary Louise Gill; Pierre Pellegrin
BlackWell Publishing, 2005
 Buku Teks SO
Armstrong, A.H.
An introduction to ancient philosophy
Newman Press, 1949
 Buku Teks SO