Gaya APA

Krass, P. (2007). Ignorance Confidence And Filthy Rich Friends : The Business Adventure Of Mark Twain, Chronic Speculator . New Jersey: John Wiley.

Gaya MLA

Krass, Peter. "Ignorance Confidence And Filthy Rich Friends : The Business Adventure Of Mark Twain, Chronic Speculator". New Jersey: John Wiley, 2007. Text.