Bell, . C. (1928). Civilization: An essay. Penguin.
Cita Chicago (17th ed.)Bell, Clive. Civilization: An Essay. Middlesex: Penguin, 1928.
Cita MLA (9th ed.)Bell, Clive. Civilization: An Essay. Penguin, 1928.
Atenció: Aquestes cites poden no estar 100% correctes.