Style de citation APA (7e éd.)

Guelzo, A. C. (2009). Abraham Lincoln as a man of ideas. Southern Illinois University Press.

Style de citation Chicago (17e éd.)

Guelzo, Allen C. Abraham Lincoln as a Man of Ideas. Carbondale: Southern Illinois University Press, 2009.

Style de citation MLA (8e éd.)

Guelzo, Allen C. Abraham Lincoln as a Man of Ideas. Southern Illinois University Press, 2009.