Gaya APA

Vitale, J, V, J. (2006). There's customer born every minute : P.T.Barnum's amazing 10 "rings of power" for creating fame, fortune, and a business empire today--guaranteed!.-- . New Jersey: John Wiley & Sons.

Gaya MLA

Vitale, Joe, Vitale,, Joe. "There's customer born every minute : P.T.Barnum's amazing 10 "rings of power" for creating fame, fortune, and a business empire today--guaranteed!.--". New Jersey: John Wiley & Sons, 2006. Buku.