Herndon, W. H. (2000). Herndon's Lincoln. Digital Scanning.
Chicago Style (17th ed.) ZitazioaHerndon, William Henry. Herndon's Lincoln. Scituate, Mass.: Digital Scanning, 2000.
MLA (9th ed.) ZitazioaHerndon, William Henry. Herndon's Lincoln. Digital Scanning, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.