Gaya APA

Krass, P. (2007). Ignorance, Confidence and Filthy Rich Friends : The Business Adventures of Mark Twain, Chronic Speculator and Entrepreneur / Peter Krass . New Jersey: John and Wiley.

Gaya MLA

Krass, Peter. "Ignorance, Confidence and Filthy Rich Friends : The Business Adventures of Mark Twain, Chronic Speculator and Entrepreneur / Peter Krass". New Jersey: John and Wiley, 2007. Buku.