Will Rogers, Bryan B. Sterling, Frances N. Sterling (1993). “Will Rogers' World: America's Foremost Political Humorist Comments on the Twenties and Thirties--and Eighties and Nineties”, p.86, Rowman & Littlefield
William F. Buckley Jr. (2010). “Athwart History: Half a Century of Polemics, Animadversions, and Illuminations: A William F. Buckley Jr. Omnibus”, p.42, Encounter Books