Cita APA (7a ed.)

Kean, D., & Cowpe, C. (2008). How to win friends and influence profits: The art of winning more business from your clients. Cyan.

Cita Chicago Style (17a ed.)

Kean, David, y Chris Cowpe. How to Win Friends and Influence Profits: The Art of Winning More Business from Your Clients. London: Cyan, 2008.

Cita MLA (9a ed.)

Kean, David, y Chris Cowpe. How to Win Friends and Influence Profits: The Art of Winning More Business from Your Clients. Cyan, 2008.