Cita APA (7a ed.)

Guthrie, W. (1950). The greek philosophers: From Thales to Aristotle. Harper Brothers.

Cita Chicago Style (17a ed.)

Guthrie, W.K.C. The Greek Philosophers: From Thales to Aristotle. New York: Harper Brothers, 1950.

Cita MLA (8a ed.)

Guthrie, W.K.C. The Greek Philosophers: From Thales to Aristotle. Harper Brothers, 1950.