@misc{Luther_Martin_(1483-1546)_Luthers_[ca,
 author={Luther, Martin (1483-1546)},
 address={Stuttgart},
 howpublished={online},
 year={[ca 1890]},
 publisher={Union Deutsche Verlagsgesellschaft},
 language={niemiecki},
 title={Luthers Schriften},
 type={tekst},
}