2022 World Cup referees in Qatar are adding more stoppage time : NPR
Meet Sarah Thomas - first female NFL official referee - ESPN
What it takes to be a referee in the World Cup - The Washington Post
Official (gridiron football) - Wikipedia
College Football Referee Mike Defee's Buff Arms Steal the Show
Johnny Grier, N.F.L.'s First Black Referee, Dies at 74 - The New York Times
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Meet Beef Ref: Jacked football referee shares his workout plan - SBNation.com
/cdn.vox-cdn.com/uploads/chorus_asset/file/24445693/1405141229.jpg "XFL official Amanda Sauer is the first out pro football referee - Outsports")
XFL official Amanda Sauer is the first out pro football referee - Outsports
12-year veteran Ron Torbert to referee first Super Bowl | AP News
Elite football referees predict where a foul will happen, research shows | Psychology | The Guardian
Lo van Pham honored to be first Asian American NFL official – The Denver Post
Officials' Responsibilities & Positions | NFL Football Operations
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Meet Beef Ref: Jacked football referee shares his workout plan - SBNation.com
NFL's First All-Black Crew Officiated 'Monday Night Football' Game : NPR
/cdn.vox-cdn.com/uploads/chorus_asset/file/23133558/1236214561.jpg "Steve Strimling is the Cotton Bowl referee, blazing a trail for others - Outsports")
Steve Strimling is the Cotton Bowl referee, blazing a trail for others - Outsports
FIFA World Cup 2022: Stephanie Frappart, Women referees - top facts
:format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/13529111/20121011_ajl_ac4_788.0.jpg "Football referee mechanics explained - CougCenter")
Football referee mechanics explained - CougCenter
Who is the female college football referee working Ohio State-Penn State?
How far will footballers run in the World Cup?
Want to become a top-level football referee? You'll need 'super vision' | WIRED UK
Fans couldn't believe the size of college football referee Christian Watson during Thursday night's game | The US Sun
Ronald Torbert - Wikipedia
/cdn.vox-cdn.com/uploads/chorus_asset/file/24073302/1242337657.jpg "Another step in the right direction for women in Italian football - Viola Nation")