Lang, H. J. (1946). The Wit and Wisdom of Abraham Lincoln as Reflected in His Briefer Letters and Speeches (5. Aufl.). The World Publishing Company.
Lua i Stíl Chicago (17ú heag.)Lang, H. Jack. The Wit and Wisdom of Abraham Lincoln as Reflected in His Briefer Letters and Speeches. 5. Aufl. Cleveland;New York: The World Publishing Company, 1946.
Lua MLA (8ú heag.)Lang, H. Jack. The Wit and Wisdom of Abraham Lincoln as Reflected in His Briefer Letters and Speeches. 5. Aufl. The World Publishing Company, 1946.
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