Townson, D., & Palmer, A. W. (2001). The new Penguin dictionary of modern history, 1789-1945 (2nd ed.). Penguin Books.
Lua i Stíl Chicago (17ú heag.)Townson, Duncan, agus Alan Warwick Palmer. The New Penguin Dictionary of Modern History, 1789-1945. 2nd ed. London, England ; New York, N.Y., USA: Penguin Books, 2001.
Lua MLA (8ú heag.)Townson, Duncan, agus Alan Warwick Palmer. The New Penguin Dictionary of Modern History, 1789-1945. 2nd ed. Penguin Books, 2001.
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