Cita APA

 Buffett, W. (2007).  Warren Buffett speaks: Wit and wisdom from the world’s greatest investor.  John Wiley & Sons.

Chicago Style Citation

 Buffett, Warren.  Warren Buffett Speaks: Wit and Wisdom From the World’s Greatest Investor.  John Wiley & Sons, 2007.

Cita MLA

 Buffett, Warren.  Warren Buffett Speaks: Wit and Wisdom From the World’s Greatest Investor.  John Wiley & Sons, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.