@misc{Haydn_Joseph_(1732-1809)_Sonate,
 author={Haydn, Joseph (1732-1809)},
 howpublished={online},
 publisher={Eduard Hallberger},
 language={ger},
 title={Sonate für das Pianoforte. Nr. 6, G moll},
 type={druk muzyczny},
 keywords={nuty},
}