Time-Life Books. (1989). The Age of calamity: Time frame AD 1300-1400. Time-Life Books.
Cita Chicago (17th ed.)Time-Life Books. The Age of Calamity: Time Frame AD 1300-1400. Alexandria, Va: Time-Life Books, 1989.
Cita MLA (9th ed.)Time-Life Books. The Age of Calamity: Time Frame AD 1300-1400. Time-Life Books, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.