F. Eugene Heathe, 2007. Encyclopedia of Business Ethics and Society, SAGE, 89Arxivləşdirilib 2019-10-16 at the Wayback Machine: "an economist of the Austrian school".
Ronald Hamowy, ed., 2008, The Encyclopedia of Libertarianism, Cato Institute, SAGE, ISBN 1-41296580-2, p. 62: "a leading economist of the Austrian school"; pp. 11, 365, 458: "Austrian economist".
F. Eugene Heathe, 2007. Encyclopedia of Business Ethics and Society, SAGE, 89Arxivləşdirilib 2019-10-16 at the Wayback Machine: "an economist of the Austrian school".
Ronald Hamowy, ed., 2008, The Encyclopedia of Libertarianism, Cato Institute, SAGE, ISBN 1-41296580-2, p. 62: "a leading economist of the Austrian school"; pp. 11, 365, 458: "Austrian economist".
Casey, Gerard (2010). Meadowcroft, John (ed.). Murray Rothbard. Major Conservative and Libertarian Thinkers. 15. London: Continuum. pp. 5, 16–17. ISBN 978-1-4411-4209-2.