Middlebrook, M. (1983). The Kaiser's Battle, 21 March 1918 - the first day of the German Spring Offensive. Middlesex: Penguin Books.
Citazione stile Chigago Style (17a edizione)Middlebrook, Martin. The Kaiser's Battle, 21 March 1918 - the First Day of the German Spring Offensive. Middlesex: Penguin Books, 1983.
Citatione MLA (8a ed.)Middlebrook, Martin. The Kaiser's Battle, 21 March 1918 - the First Day of the German Spring Offensive. Middlesex: Penguin Books, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.