@misc{Prończuk_Anna_Churn,
 author={Prończuk, Anna},
 howpublished={online},
 publisher={Publishing House of the University of Economics in Katowice},
 language={eng},
 title={Churn Risk Identification as an Important Aspect of Marketing Controlling – the Case of a German Start-Up Company},
 type={czasopismo},
 keywords={kontrola marketingu, ryzyko rezygnacji, zadowolenie klienta, zarządzanie projektem},
}