@misc{Ptaśnik_Jan_(1876-1930)_Kultura,
 author={Ptaśnik, Jan (1876-1930)},
 howpublished={online},
 publisher={Biblioteka Polska (Warszawa)},
 language={Polish},
 title={Kultura włoska wieków średnich w Polsce},
 type={book},
 keywords={Poland, Italy, Middle Ages, culture, history},
}