Nichols, R. F., & Nichols, J. P. (1943). A short history of American democracy. D. Appleton-Century Co.
Lua i Stíl Chicago (17ú heag.)Nichols, Roy F., agus Jeannette Paddock Nichols. A Short History of American Democracy. New York, London: D. Appleton-Century Co, 1943.
Lua MLA (8ú heag.)Nichols, Roy F., agus Jeannette Paddock Nichols. A Short History of American Democracy. D. Appleton-Century Co, 1943.
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