Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (8ú heag.)

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

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