Here's a list of NFL teams that have never won a Super Bowl – NBC
Cincinnati Bengals Super Bowl History: From Appearances to Close Wins
List of Super Bowl champions - Wikipedia
AFC Championship Game history: Wins, losses, results, teams
Looking back at Bengals' first two Super Bowl appearances
Kansas City Chiefs collapse to Bengals, missing Super Bowl for
This Day in The Bay: 49ers Defeat Cincinnati Bengals in Super Bowl
Bengals at the Super Bowl: last appearances, rings and NFL finals
List of Super Bowl Appearances by Team
The Cincinnati Bengals Are Going to the Super Bowl, Baby!