Wheeler, H. (1971). Democracy in a revolutionary era: The political order today. Penguin.
Cita Chicago (17th ed.)Wheeler, Harvey. Democracy in a Revolutionary Era: The Political Order Today. Harmondsworth: Penguin, 1971.
Cita MLA (8th ed.)Wheeler, Harvey. Democracy in a Revolutionary Era: The Political Order Today. Penguin, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.