Cita APA (7th ed.)
Sandburg, C. Abraham Lincoln: The prairie years and the years. Laurel edition.
Cita Chicago (17th ed.)
Sandburg, Carl. Abraham Lincoln: The Prairie Years and the Years. New York: Laurel edition.
Cita MLA (9th ed.)
Sandburg, Carl. Abraham Lincoln: The Prairie Years and the Years. Laurel edition.
Atenció: Aquestes cites poden no estar 100% correctes.