Woodruff, W. (2005). Concise history of the modern world: 1500 to the present : a guide to world affairs (NA.). Abacus.
Lua i Stíl Chicago (17ú heag.)Woodruff, William. Concise History of the Modern World: 1500 to the Present : A Guide to World Affairs. NA. Great Britain: Abacus, 2005.
Lua MLA (9ú heag.)Woodruff, William. Concise History of the Modern World: 1500 to the Present : A Guide to World Affairs. NA. Abacus, 2005.
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