Cita APA (7th ed.)

Barker, S. E. (1967). Greek political theory: Plato and his predecessors. Methuen.

Cita Chicago (17th ed.)

Barker, Sir Ernest. Greek Political Theory: Plato and His Predecessors. London: Methuen, 1967.

Cita MLA (9th ed.)

Barker, Sir Ernest. Greek Political Theory: Plato and His Predecessors. Methuen, 1967.