John Madden Football '93 Sega Genesis Gameplay HD
John Madden '94 - Mega Drive review from Computer And Video Games Issue 144 - November 1993 : r/retrogamingmagazines
John Madden Football '93 - SEGA Online Emulator
Football's Greatest Lineup Ever! Now With 38 Pro Teams! - 8 Greatest-Ever Teams: Miami '72, Dallas '77, Washington '82, Chicago '85, Oakland '76
at@Games Genesis Compatibility List - The Independent Video Game Community
Madden Football History and EA's Other Notable Genesis Football Games - RetroGaming with Racketboy
John Madden Football Box Shot for Genesis - GameFAQs
The Making of NHL '94: An Oral History - The Hockey News