Edinburgh Napier University meeting your CPD and educational needs
Sharp Focus TV professional video production with expertise in the sports official
Sports Officiating Research Bibliography all the latest research into sports officials and officiating
Research Gate Duncan’s Research Publications
Sports Officials & Officiating: Science & Practice purchase a copy of the first textbook on the research into sports officials through Amazon
Referee Magazine The magazine for sports officials, written by experts and veterans in the field
Referee Psychologist 