Sandburg, C. (1959). Abraham Lincoln: The prairie years and the war years. Dell Publishing Co.
Lua i Stíl Chicago (17ú heag.)Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years. New York: Dell Publishing Co, 1959.
Lua MLA (9ú heag.)Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years. Dell Publishing Co, 1959.
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