Aschheim, J.; Tavlas, G. S.; Heinsohn, G.; Steiger, O.; Wood (editor), John Cunningham (1994). 〈The Monetary Thought-Ideology Nexus: Simons verses Keynes; Marx and Keynes – Private Property and Money〉. 《John Maynard Keynes: Critical Assessments , p 101–120 , 135》. Second. Routeledge and Google Books. ISBN978-0-415-11415-8. 2009년 6월 15일에 확인함.