Sandburg, C. (1939). Abraham Lincoln: The war years. Harcourt, Brace & company.
芝加哥风格引文Sandburg, Carl. Abraham Lincoln: The War Years. New York: Harcourt, Brace & company, 1939.
MLA引文Sandburg, Carl. Abraham Lincoln: The War Years. Harcourt, Brace & company, 1939.
警告：这些引文格式不一定是100％准确.