„John Blankenstein” változatai közötti eltérés

 
== Források ==
*{{cite [web|url=http://worldreferee.com/site/copy.php?linkID=1824&linkType=referee&contextType=bio]
|title=John Blankenstein|accessdate=2011-08-20|publisher=World Referee}}
*{{cite [web |url=http://www.zerozerofootball.com/arbitro.php?id=692&search=1]
* [http://www.footballdatabase.eu/football.arbitres.john.blankenstein.1069.en.html]
|title=John Blankenstein|accessdate=2011-08-20|publisher= zerozerofootball.com}}
* [http://www.football-lineups.com/referee/2017/]
*{{cite [web |url=http://www.footballdatabase.eu/football.arbitres.john.blankenstein.1069.en.html]
|title=John Blankenstein|accessdate=2011-08-20|publisher=footballdatabase.eu}}
*{{cite web |url=http://scoreshelf.com/zjbb/en/The_Netherlands/NED_JohnBlankenstein
|title=John Blankenstein|accessdate=2011-08-20|publisher=scoreshelf.com}}
 
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