Fredrickson, G. M. (2008). Big enough to be inconsistent: Abraham Lincoln confronts slavery and race. Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Fredrickson, George M. Big Enough to Be Inconsistent: Abraham Lincoln Confronts Slavery and Race. Cambridge, Mass.: Harvard University Press, 2008.
Lua MLA (9ú heag.)Fredrickson, George M. Big Enough to Be Inconsistent: Abraham Lincoln Confronts Slavery and Race. Harvard University Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.