APA (7th ed.) Citation

Charles I, E. o. A. (1916). [Order of the Day to his troops on the front during World War I].

Chicago Style (17th ed.) Citation

Charles I, Emperor of Austria. [Order of the Day to His Troops on the Front During World War I]. 1916.

MLA (9th ed.) Citation

Charles I, Emperor of Austria. [Order of the Day to His Troops on the Front During World War I]. 1916.

Warning: These citations may not always be 100% accurate.