Cita APA (7th ed.)
Ellis, C. D. (2013). What it takes: Seven secrets of success from the world's great professional firms. John Wiley & Sons, Inc..
Cita Chicago (17th ed.)
Ellis, Charles D. What It Takes: Seven Secrets of Success from the World's Great Professional Firms. Hoboken, N.J.: John Wiley & Sons, Inc., 2013.
Cita MLA (9th ed.)
Ellis, Charles D. What It Takes: Seven Secrets of Success from the World's Great Professional Firms. John Wiley & Sons, Inc., 2013.
Atenció: Aquestes cites poden no estar 100% correctes.