A referee is an official in a sports game.

Blank 133x176
Referees, Match Offici...
Tom Webb
Blowing The Whistle: The Psychology of Football Refereeing
the Social Ref: How to Become a Better Referee and Umpire
The Rules Of The Game
Geoff Hurst, the Hand of God, and the Biggest Rows in World Football
The Worst Call Ever!: The Most Infamous Calls Ever Blown by Referees, Umpires, and Other Blind Officials