Warneck, E. (1918). Was kann und was muss uns der Weltkrieg lehren? Kronenkampf-Verlag.
Citazione stile Chigago Style (17a edizione)Warneck, Eugen. Was Kann Und Was Muss Uns Der Weltkrieg Lehren? Essen: Kronenkampf-Verlag, 1918.
Citatione MLA (9a ed.)Warneck, Eugen. Was Kann Und Was Muss Uns Der Weltkrieg Lehren? Kronenkampf-Verlag, 1918.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.