Cita APA (7th ed.)

Sandburg, C. (1959). Abraham Lincoln: The prairie years and the war years. Dell Publishing Co.

Cita Chicago (17th ed.)

Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years. New York: Dell Publishing Co, 1959.

Cita MLA (9th ed.)

Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years. Dell Publishing Co, 1959.