Dale Carnegie. (2010). How to win friends and influence people. Pocket Books.
Cita Chicago (17th ed.)Dale Carnegie. How to Win Friends and Influence People. New York: Pocket Books, 2010.
Cita MLA (8th ed.)Dale Carnegie. How to Win Friends and Influence People. Pocket Books, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.