@misc{_Do_[post,
 editor={Hafe, Johann. Il.},
 copyright={Public Domain},
 address={[Warszawa?]},
 howpublished={online},
 year={[post 6 XII 1791]},
 publisher={Dufour, Piotr (1730-1797). Druk.},
 language={pol},
 title={Do Przyiaciela Burczybąka},
 type={Text},
 URL={http://www.rcin.org.pl/Content/35315/PDF/WA248_52826_XVIII-2-825_przyiaciela-burczy_o.pdf},
 keywords={Constitution of the 3rd of May 1791 (Poland), Polish journalistic writing - 18th c.},
}