Gottschalk, L. R. (1960). Understanding history: A primer of historical method. Knopf.
芝加哥风格引文Gottschalk, Louis Reichenthal. Understanding History: A Primer of Historical Method. New York: Knopf, 1960.
MLA引文Gottschalk, Louis Reichenthal. Understanding History: A Primer of Historical Method. Knopf, 1960.
警告：这些引文格式不一定是100％准确.