@misc{Perlbach_Max_Regesten,
 author={Perlbach, Max},
 howpublished={online},
 publisher={b. w.},
 language={ger},
 title={Regesten der Stadt Königsberg 1256-1524},
 type={książka},
 keywords={Królewiec - historia - 13-16 w., Perlbach, Max (1848-1921)},
}