Kanfer, S., & Marx, G. (2008). The essential Groucho: Writings by, for and about Groucho Marx. Penguin.
Chicago Style (17. basım) AtıfKanfer, Stefan, ve Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. London: Penguin, 2008.
MLA (9th ed.) AtıfKanfer, Stefan, ve Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. Penguin, 2008.
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