Thelen, David P. (Verão de 1970). «Rutherford B. Hayes and the Reform Tradition in the Gilded Age». American Quarterly. 22 (2): 150–165. JSTOR2711639. doi:10.2307/2711639
Thelen, David P. (Verão de 1970). «Rutherford B. Hayes and the Reform Tradition in the Gilded Age». American Quarterly. 22 (2): 150–165. JSTOR2711639. doi:10.2307/2711639