Time-Life Books. (1989). The age of calamity: Time frame AD 1300-1400. Time-Life Books.
Čikaški stil citiranja (17. izdanje)Time-Life Books. The Age of Calamity: Time Frame AD 1300-1400. Alexandria, Va: Time-Life Books, 1989.
MLA način citiranja (9. izdanje)Time-Life Books. The Age of Calamity: Time Frame AD 1300-1400. Time-Life Books, 1989.
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