Guenther, I. (2018). Postcards from the trenches: A German soldier's testimony of the great war. Bloomsbury Visual Arts.
Chicago-referens (17:e uppl.)Guenther, Irene. Postcards from the Trenches: A German Soldier's Testimony of the Great War. London: Bloomsbury Visual Arts, 2018.
MLA-referens (9:e uppl.)Guenther, Irene. Postcards from the Trenches: A German Soldier's Testimony of the Great War. Bloomsbury Visual Arts, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.