Quoted in "He guaranteed it" http://www.profootballhof.com/news/he-guaranteed-it1/, ProFootballHOF.com (January 1, 2005).
Joe Namath: Frases en inglés
Quoted in "9 superstar athletes who don't eat meat" https://www.mnn.com/food/healthy-eating/photos/9-superstar-athletes-who-dont-eat-meat/joe-namath by Brian Merchant, MNN.com (March 5, 2013).