Toynbee, A. J. The disintegrations of civilizations (7a ed.).
Cita Chicago (17th ed.)Toynbee, Arnold J. The Disintegrations of Civilizations. 7a ed.
Cita MLA (8th ed.)Toynbee, Arnold J. The Disintegrations of Civilizations. 7a ed.
Atenció: Aquestes cites poden no estar 100% correctes.