List of Madden titles, Madden Wiki
Madden NFL 25 (Game) - Giant Bomb
Madden NFL '94 for Sega Genesis - Sales, Wiki, Release Dates, Review, Cheats, Walkthrough
John Madden Football '93 - Wikipedia
Bill Walsh College Football, NCAA Football Wiki
Madden NFL 2004, Nintendo
Joe Montana Football - Wikipedia
Madden NFL (Video Game) - TV Tropes