@misc{Kotzebue_August_von_Preussens,
 author={Kotzebue, August von},
 howpublished={online},
 publisher={Carl Johann Gottfried Hartmann},
 language={ger},
 title={Preussens ältere Geschichte. Bd. 1},
 type={książka},
 keywords={Prusy - historia, Kotzebue, August Friedrich von (1761-1819)},
}