Guthrie, W. K. C., & Guthrie, W. K. C. (1980). The presocratic tradition from Parmenides to Democritus. Cambridge Univ. Press.

Guthrie, William Keith Chambers, and William Keith Chambers Guthrie. The Presocratic Tradition from Parmenides to Democritus. Cambridge [u.a.]: Cambridge Univ. Press, 1980.

Guthrie, William Keith Chambers, and William Keith Chambers Guthrie. The Presocratic Tradition from Parmenides to Democritus. Cambridge Univ. Press, 1980.