APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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

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