Kozinska-Witt, H. (1999). Ludwig Gumplowicz's programme for the improvement of the jewish situation. Polin.
Citazione stile Chigago Style (17a edizione)Kozinska-Witt, Hanna. "Ludwig Gumplowicz's Programme for the Improvement of the Jewish Situation." Polin 1999.
Citatione MLA (8a ed.)Kozinska-Witt, Hanna. "Ludwig Gumplowicz's Programme for the Improvement of the Jewish Situation." Polin, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.