Cita APA (7a ed.)

Allen, R. E. (1966). Greek philosophy: Thales to Aristotle. The Free press.

Cita Chicago Style (17a ed.)

Allen, Reginald E. Greek Philosophy: Thales to Aristotle. New York: The Free press, 1966.

Cita MLA (9a ed.)

Allen, Reginald E. Greek Philosophy: Thales to Aristotle. The Free press, 1966.