Williams, F. J., Holzer, H., & Simon, J. Y. (2002). Judging Lincoln. Southern Illinois University Press.
Lua i Stíl Chicago (17ú heag.)Williams, Frank J., Harold Holzer, agus John Y. Simon. Judging Lincoln. Carbondale: Southern Illinois University Press, 2002.
Lua MLA (9ú heag.)Williams, Frank J., et al. Judging Lincoln. Southern Illinois University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.