Diary entry. "Diary and Letters of Rutherford Birchard Hayes: Nineteenth President of the United States". Book edited by Charles Richard Williams, The Ohio State Archaeological and Historical Society, February 14, 1879.
"Billionaire Sheldon Adelson Says He Might Give $100M To Newt Gingrich Or Other Republican". Interview with Steven Bertoni, www.forbes.com. February 21, 2012.