- Rules of Squash -
- National Association of Sports Officials (NASO) -
- Referee -
- Officiating.Com - online source for basketball officials.
- Cyber-Ref - sports officiating news, chat, discussion board.
- NSW Cricket Umpires Association - with umpire and scorer members.
- Laws of Rugby -
- New Hampshire Lacrosse Officials Association - includes upcoming events, official rules, newsletter, and more.
- Referee/Umpire - information on sports officiating including baseball, basketball, football, soccer, wrestling and others at the high school, college and pro levels.
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