Kanfer, S., & Marx, G. (2008). The essential Groucho: Writings by, for and about Groucho Marx. Penguin.
芝加哥风格引文Kanfer, Stefan, 与 Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. London: Penguin, 2008.
MLA引文Kanfer, Stefan, 与 Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. Penguin, 2008.
警告：这些引文格式不一定是100％准确.