, R., , M. (2017). The effectiveness of exercises using the Cogni Balz to develop attention in the referees of football. , 17(2), 28-34.
Raafat abdel hadi alkroi ; mohannad fadal abdul sada . " The effectiveness of exercises using the Cogni Balz to develop attention in the referees of football". , 17, 2, 2017, 28-34.
, R., , M. (2017). ' The effectiveness of exercises using the Cogni Balz to develop attention in the referees of football', , 17(2), pp. 28-34.
, R., , M. The effectiveness of exercises using the Cogni Balz to develop attention in the referees of football. , 2017; 17(2): 28-34.