William Shakespeare (2013). “Second Tetralogy In Plain and Simple English: Includes Richard II, Henry IV Parts 1 and 2, and Henry V”, p.38, BookCaps Study Guides
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.150, Rowman & Littlefield