Trump, Donald J.; Schwartz, Tony (2009). Trump: The Art of the Deal(en inglés). New York: Random House. p. 96. ISBN978-0-307-57533-3. «I have a father who has always been a rock, very straight and very solid.... And I’m as much of a rock as my father. This was a totally different world. I remember wondering if every successful person in Manhattan was a big drinker. I figured if that was the case, I was going to have a big advantage.»
Trump, Donald J.; Leerhsen, Charles (1990). Trump: Surviving at the Top(en inglés). New York: Random House. p. 40. ISBN978-0-307-57533-3. «Discipline is something I learned from watching my father... Long vacations, drinking, drugs—all of those things are bad for discipline.»
