MADDEN NFL evolution [1988 - 2019]
John Madden's absence from NFL life is never felt more than on Thanksgiving, NFL
John Madden Remembered: “Dearly Loved”, “Nobody Had a Bigger Impact On The NFL” – Deadline
Madden NFL Covers Through the Years - Sports Illustrated
John Madden, American-football coach turned TV sportscaster whose high-spirited style endeared him to millions – obituary
The history of John Madden Football - Polygon
The covers of the Madden video game
Madden 15 glitch sends lineman flying through the air - Sports Illustrated
John Madden to grace cover of Madden NFL 23 video game; first time on front since Madden 2000 - ESPN
Gold Jacket Spotlight: One Man, Three Careers - John Madden