@misc{Černenko_Maksim._Improvement,
 author={Černenko, Maksim. and Âkovlêv, Anatolìj Ìvanovič (1937- ).},
 howpublished={online},
 publisher={Wydawnictwo UMCS},
 language={eng},
 type={artykuł},
 title={Improvement of methods for determining the efficiency of advertising},
 keywords={Reklama -- efektywność},
}