Gehrke, P. J. (2009). The ethics and politics of speech: Communication and rhetoric in the twentieth century. Southern Illinois University Press.
芝加哥风格引文Gehrke, Pat J. The Ethics and Politics of Speech: Communication and Rhetoric in the Twentieth Century. Carbondale: Southern Illinois University Press, 2009.
MLA引文Gehrke, Pat J. The Ethics and Politics of Speech: Communication and Rhetoric in the Twentieth Century. Southern Illinois University Press, 2009.
警告：这些引文格式不一定是100％准确.