Duda, G. Was ist und was will die Ludendorff-Bewegung? Verlag Hohe Warte.
Citazione stile Chigago Style (17a edizione)Duda, Gunther. Was Ist Und Was Will Die Ludendorff-Bewegung? [Ohne Ort]: Verlag Hohe Warte.
Citatione MLA (8a ed.)Duda, Gunther. Was Ist Und Was Will Die Ludendorff-Bewegung? Verlag Hohe Warte.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.