Hockey referee blows his whistle and gestures to exclude a fouling

Can a red card be issued after the game has just finished? - Quora

The Origin of the Referee's Whistle - Scouting The Refs

Whistle before every face-off? : r/hockeyrefs

Blow the damn whistle': The NHL has to stop letting player safety depend on referees' judgment calls

What if a coach flips off a referee after a bad call? - Quora

Referee Stephane Auger blows his whistle as Calgary Flames' Rene Bourque skates past during first period NHL hockey action against the Pittsburgh Penguins in Calgary, Wednesday, Jan. 13, 2010. Vancouver Canucks forward

Joey Crawford Sounds Off on 35 Years as an N.B.A. Referee - The New York Times

What if a coach flips off a referee after a bad call? - Quora

SEE IT: NHL referee curses out player before announcing penalty call — WARNING GRAPHIC LANGUAGE – New York Daily News

Official Rule Book of Hockey Canada - Noralta Junior Hockey League

Officially Speaking: Goal or no goal?

USA Hockey Officials Signals Flashcards