Cita APA (7a ed.)

Kanfer, S., & Marx, G. (2008). The essential Groucho: Writings by, for and about Groucho Marx. Penguin.

Cita Chicago Style (17a ed.)

Kanfer, Stefan, y Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. London: Penguin, 2008.

Cita MLA (9a ed.)

Kanfer, Stefan, y Groucho Marx. The Essential Groucho: Writings by, for and About Groucho Marx. Penguin, 2008.