Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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