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MLB - Major League Baseball

NBA - National Basketball Association

IBU - International Biathlon Union

IBA - International Boxing Association

World Curling Federation

FIFA laws of football
(Federation Internationale de Football Association)
(pdf format)

NFL (National Football League) rulebook

NHL (National Hockey League) rulebook

WPA - World Pool-Billiard Association
(in pdf format)

International Racquetball Federation
(English and Spanish, in pdf format)

ISF - International Softball Federation
(English and Spanish, in pdf format)

World Squash Federation

ITF - International Tennis Federation

UPA - Ultimate Players Association

WFDF - World Flying Disc Federation

FIVB - Federation Internationale de Volleyball
(Arabic, English and French, in pdf format)