De Voto, B. A. (1952). The course of empire. Houghton Mifflin.
芝加哥风格引文De Voto, Bernard Augustine. The Course of Empire. Boston: Houghton Mifflin, 1952.
MLA引文De Voto, Bernard Augustine. The Course of Empire. Houghton Mifflin, 1952.
警告：这些引文格式不一定是100％准确.