"Saving the American Idea: Rejecting Fear, Envy, and the Politics of Division". Speech at The Heritage Foundation, House Budget Committee Chairman Paul Ryan (R-WI), www.heritage.org. November 15, 2011.
John George Nicolay (2008). “A Short Life of Abraham Lincoln: Condensed from Nicolay & Hay's Abraham Lincoln: a History: Easyread Large Edition”, p.56, ReadHowYouWant.com