Citazione Stile APA (7a Edizione)

Guthrie, W. K. C., & Guthrie, W. K. C. (1977). The earlier Presocratics and the Phythagoreans. Cambridge Univ. Press.

Citazione stile Chigago Style (17a edizione)

Guthrie, William Keith Chambers, e William Keith Chambers Guthrie. The Earlier Presocratics and the Phythagoreans. Cambridge [u.a.]: Cambridge Univ. Press, 1977.

Citatione MLA (8a ed.)

Guthrie, William Keith Chambers, e William Keith Chambers Guthrie. The Earlier Presocratics and the Phythagoreans. Cambridge Univ. Press, 1977.