APA (7th ed.) Zitazioa
Keller, N. (2013). Make it all about them: Winning sales presentations. Wiley.
Chicago Style (17th ed.) Zitazioa
Keller, Nadine. Make It All About Them: Winning Sales Presentations. Hoboken, N.J.: Wiley, 2013.
MLA (9th ed.) Zitazioa
Keller, Nadine. Make It All About Them: Winning Sales Presentations. Wiley, 2013.
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