Humes, J. C. (2002). Speak like churchill, stand like lincoln: 21 powerful secrets of history's greatest speakers. AUWSF.
Chicago-viite (17. p.)Humes, James C. Speak like Churchill, Stand like Lincoln: 21 Powerful Secrets of History's Greatest Speakers. New York: AUWSF, 2002.
MLA-viite (9. p.)Humes, James C. Speak like Churchill, Stand like Lincoln: 21 Powerful Secrets of History's Greatest Speakers. AUWSF, 2002.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.