@misc{Sykstus_V_(papież_;_1521-1590)_Literae,
 author={Sykstus V (papież ; 1521-1590)},
 address={Kraków},
 howpublished={online},
 publisher={Januszowski, Jan (1550-1613). Druk.},
 language={lat},
 title={Literae Processvs (...) Lectae die Coenae Domini, Anno 1586},
 type={stary druk},
}