Refereeing

Fair or foul: the complete guide to soccer officiating in America

by Paul E. Harris, Jr. & Larry R. Harris.

Officiating soccer

Rosemarie Graham.

Elite Soccer Referees: Officiating in the Premier League, la Liga and Serie A

Tom Webb

Le mie regole del gioco: quello che il calcio mi ha insegnato della vita

Pierluigi Collina

The Official FA Guide to Basic Refereeing (Official Fa Guide)

John Peter Baker, John Baker

Rules For Umps: Baseball 2001, High School and NCAA

Bill Topp

The Man in Black - A History of the Football Referee

Gordon Thomson

Soccer referee: a guide to fitness and technique

Clive Thomas and Tom Hudson.

Smart Basketball Officiating

Bill Topp, Carl P. Schwartz

The game of the century

[by] Derek Conrad, Robert Sidaway, Bob Wilson.