Hofstadter, R. (1968). The progressive historians: Turner, Beard, Parrington. Knopf.
芝加哥风格引文Hofstadter, Richard. The Progressive Historians: Turner, Beard, Parrington. New York: Knopf, 1968.
MLA引文Hofstadter, Richard. The Progressive Historians: Turner, Beard, Parrington. Knopf, 1968.
警告：这些引文格式不一定是100％准确.