Cita APA (7th ed.)

Nicolay, H. (2006). Personal Traits of Abraham Lincoln. Stackpole Books.

Cita Chicago (17th ed.)

Nicolay, Helen. Personal Traits of Abraham Lincoln. Mechanicsb urg: Stackpole Books, 2006.

Cita MLA (9th ed.)

Nicolay, Helen. Personal Traits of Abraham Lincoln. Stackpole Books, 2006.