NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Are there any games like Age of Empires, but with modern armies? - Quora
John Madden to grace the cover of Madden NFL 23 - Gaming Age
Madden NFL 19: The weird story behind the first 'John Madden Football' game
Pop Star Jessica Simpson Wants Her Billion-Dollar Fashion Empire Back - Bloomberg
How NFL coach John Madden became the biggest name in video games
John Madden built a US football empire around video games
How John Madden Became the Face of a Video Game Empire - The New York Times