1878-1967 Sandburg, C. (1960). Abraham Lincoln: The prairie years and the war years: in three volumes (Primera edición.). Editoral Dell Publishing.
Lua i Stíl Chicago (17ú heag.)1878-1967 Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years: in Three Volumes. Primera edición. New York: Editoral Dell Publishing, 1960.
Lua MLA (8ú heag.)1878-1967 Sandburg, Carl. Abraham Lincoln: The Prairie Years and the War Years: in Three Volumes. Primera edición. Editoral Dell Publishing, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.