Παραπομπή σε μορφή APA (7η εκδ.)

Barker, E. S. (1960). Greek political theory: Plato and his predecessors (5th ed.). Methuen.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barker, Ernest Sir. Greek Political Theory: Plato and His Predecessors. 5th ed. London: Methuen, 1960.

Παραπομπή σε μορφή MLA (8th εκδ.)

Barker, Ernest Sir. Greek Political Theory: Plato and His Predecessors. 5th ed. Methuen, 1960.