↑ Mercuro, Nicholas; Medema, Steven G.; Samuels, Warren J. (2005-09-28). "Robert Lee Hale (1884–1969) – 法経済学者". In Backhaus, Jürgen G. (ed.). The Elgar Companion to Law and Economics (2nd ed.). Edward Elgar Publishing Limited. pp. 531–544 . ISBN9781845420321。