Scott Adams (2007). “Stick to Drawing Comics, Monkey Brain!: Cartoonist Explains Cloning, Blouse Monsters, Voting Machines, Romance, Monkey G ods, How to Avoid Being Mistaken for a Rodent, and More”, p.240, Penguin
Thorstein Veblen (2016). “BUSINESS & ECONOMICS Premium Collection: 25+ Titles in One Volume: The Theory of Business Enterprise, The Higher Learning in America, The Vested Interests and the Common Man, On the Nature of Capital…: The Theory of the Leisure Class, The Beginning of Ownership, The Preconceptions of Economic Science, The Industrial System and the Captains of Industry, The Socialist Economics of Karl Marx…”, p.396, e-artnow