@misc{Hornowska_Elżbieta_Paradoxical,
 author={Hornowska, Elżbieta and Brzezińska, Anna Izabela and Kaliszewska-Czeremska, Katarzyna and Appelt, Karolina and Rawecka, Joanna and Bujacz, Aleksandra},
 howpublished={online},
 publisher={Educational Research Institute},
 language={pol},
 type={article},
 title={Paradoxical effect of triangulation?},
 keywords={convergent validity, discriminant validity, inquiry approach, reliability, sources of data, triangulation},
}