Ketcham, R. (2004). The Idea of Democracy in the Modern Era. University Press of Kansas.
芝加哥风格引文Ketcham, Ralph. The Idea of Democracy in the Modern Era. Lawrence, Kan.: University Press of Kansas, 2004.
MLA引文Ketcham, Ralph. The Idea of Democracy in the Modern Era. University Press of Kansas, 2004.
警告：这些引文格式不一定是100％准确.