Ager, D. (2001). The soccer referee's manual (3rd ed.). Contemporary Books.
Čikaški stil citiranja (17. izdanje)Ager, David. The Soccer Referee's Manual. 3rd ed. London: Contemporary Books, 2001.
MLA način citiranja (8. izdanje)Ager, David. The Soccer Referee's Manual. 3rd ed. Contemporary Books, 2001.
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