@misc{Polak_Marcin_(c._1208_–_c._1279)_Sermones,
 author={Polak, Marcin (c. 1208 – c. 1279)},
 howpublished={online},
 publisher={Grüninger, Johann},
 language={lat},
 type={inkunabuły},
 title={Sermones de tempore et de sanctis, cum Promptuario exemplorum},
}