Williams, H. (2005). Cassell's chronology of world history: Dates, events and ideas that made history. Weidenfeld & Nicolson.
Chicago-referens (17:e uppl.)Williams, Hywel. Cassell's Chronology of World History: Dates, Events and Ideas That Made History. London: Weidenfeld & Nicolson, 2005.
MLA-referens (9:e uppl.)Williams, Hywel. Cassell's Chronology of World History: Dates, Events and Ideas That Made History. Weidenfeld & Nicolson, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.