Trích dẫn APA

 Krass, P. (2007).  Ignorance, confidence, and filthy rich friends: The business adventures of Mark Twain, chronic speculator and entrepreneur.  John Wiley & Sons.

Trích dẫn kiểu Chicago

 Krass, Peter.  Ignorance, Confidence, and Filthy Rich Friends: The Business Adventures of Mark Twain, Chronic Speculator and Entrepreneur.  John Wiley & Sons, 2007.

Trích dẫn MLA

 Krass, Peter.  Ignorance, Confidence, and Filthy Rich Friends: The Business Adventures of Mark Twain, Chronic Speculator and Entrepreneur.  John Wiley & Sons, 2007.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.