Guthrie, W.K.C.
A history of Greek philosophy
Cambridge University Press, 1989
 Buku Teks SO
Gomperz, Theodor
Greek thinkers : a history of ancient philosophy
John Murray, 1949
 Buku Teks SO
Gomperz, Theodor
Greek thinkers a history of ancient philosophy
John Murray , 1955
 Buku Teks SO
Windelband, Wilhelm
A History of philosophy: greek, romana, and medival
Happer & Brothers, 1901
 Buku Teks SO
Gomperz, Theodor
Greek thinkers : a history of ancient philosophy
John Murray, 1931
 Buku Teks SO