@misc{Posner_Stanisław_(1868-1930)_La,
 author={Posner, Stanisław (1868-1930)},
 address={Paris},
 address={Saint-Denis},
 howpublished={online},
 publisher={Librairie Félix Alcan},
 publisher={Imp. ve Bouillant et J. Dardaillon},
 language={fre},
 type={książka},
 title={La Pologne d'hier et de demain},
}