Buffalo Bill (1879). “The Life of Hon. William F. Cody, Known as Buffalo Bill, the Famous Hunter, Scout, and Guide: An Autobiography”, p.133, U of Nebraska Press
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.51, Rowman & Littlefield