Barker, E. (1951). Essay on Government (2nd.). Clarendon Press.
Cita Chicago (17th ed.)Barker, Ernest. Essay on Government. 2nd. Oxford: Clarendon Press, 1951.
Cita MLA (9th ed.)Barker, Ernest. Essay on Government. 2nd. Clarendon Press, 1951.
Atenció: Aquestes cites poden no estar 100% correctes.