Citazione Stile APA (7a Edizione)

Sandburg, C. (1939). Abraham Lincoln: The war years. Harcourt, Brace & company.

Citazione stile Chigago Style (17a edizione)

Sandburg, Carl. Abraham Lincoln: The War Years. New York: Harcourt, Brace & company, 1939.

Citatione MLA (8a ed.)

Sandburg, Carl. Abraham Lincoln: The War Years. Harcourt, Brace & company, 1939.