APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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