Floto, I. (1974) “Richard Hofstadter: The Progressive Historians. Turner, Beard, Parrington. London, Jonathan Cape, 1969. xviii + 498 s. £ 4.20.”, Historisk Tidsskrift, 130. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/51520 (Set: 17oktober2019).