The Ones That Got Away...Zidane – VitalFootball.co.uk, 2006 "Sport.co.uk meets...Football agent Barry Silkman". sport.co.uk.
2014년 8월 29일에 확인함.  The Ones That Got Away...Zidane – VitalFootball.co.uk, 2006 “Sport.co.uk meets...Football agent Barry Silkman”. sport.co.uk.