Gaya APA

Klein, T, C, :, D. (2008). Plato and a platypus walk into a bar...: understanding philosophy throught jokes . New York: Penguin Books.

Gaya MLA

Klein, Thomas, Cathcart, :, Daniel. "Plato and a platypus walk into a bar...: understanding philosophy throught jokes". New York: Penguin Books, 2008. Text.