Brude-Firnau, G. Preussische Predigt: Die Reden Wilhelms II. / Gisela Brude-Firnau. The turn of the century : German literature and art, 1890 - 1915.(1983).

Brude-Firnau, Gisela. "Preussische Predigt: Die Reden Wilhelms II. / Gisela Brude-Firnau." The Turn of the Century : German Literature and Art, 1890 - 1915.(1983) .

Brude-Firnau, Gisela. "Preussische Predigt: Die Reden Wilhelms II. / Gisela Brude-Firnau." The Turn of the Century : German Literature and Art, 1890 - 1915.(1983), .