@misc{Weber-Krohse_Otto_Ritterorden,,
 author={Weber-Krohse, Otto},
 howpublished={online},
 publisher={Schlieffen-Verlag},
 language={ger},
 title={Ritterorden, Preußen und Reich},
 type={książka},
 keywords={Prusy - historia, Zakon Krzyżacki - historia},
}