@misc{Martínkova_Irena_The,
 author={Martínkova, Irena and Parry, Jim},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={The double instrumentality in sport},
 keywords={sport, instrumentality, extrinsic goals, intrinsic goals, process},
}