NFL100: Before they were zebras, they were … candy canes? – Football Zebras
Straight from player to official
Nfl referee goal hi-res stock photography and images - Alamy
NFL | John Parry: interview with the veteran NFL referee John Parry: interview with the veteran NFL referee - AS USA
AFL On-Field Officials
The Gridiron Uniform Database
Sarah Thomas: Kicked out of basketball, she made it to the Super Bowl | CNN
NFL100: Before they were zebras, they were … candy canes? – Football Zebras
Super Bowl ref Carl Cheffers on defensive holding call: It was a clear jersey grab - ProFootballTalk
New ref uniforms announced for 2022-23 season : r/KansasCityChiefs
Referees american football hi-res stock photography and images - Alamy
Former NFL ref says: Pay no heed to Marshall's outburst
After further review: Former NFL referee Jim Tunney on staying lively and active – Monterey Herald
Notre Dame, Michigan, and Referees Wear Throwback Jerseys for Night Game
Football Referee Uniforms History . url: http://safootballuniformss.blogspot.com/2015/10/football-referee-uniforms-hi… | Football referee, Referee uniforms, Referee
Why Referees' Shirts Are Black-and-White Striped | Mental Floss
File:Referee announces call at UCLA at Cal 10-25-08.JPG - Wikimedia Commons
Ask Sam Farmer: Are there throwback uniforms for NFL officials? - Los Angeles Times
Super Bowl 2023: Referee Carl Cheffers assigned for Chiefs-Eagles game