Historical units of agencies of the first World War
MLA
Drewry, Elizabeth B. Historical Units of Agencies of the First World War. Washington: National Archives of the United States, 1942
APA, 7th edition
Drewry, E. B. (1942). Historical units of agencies of the first World War. Washington: National Archives of the United States
Chicago, 17th edition
Drewry, Elizabeth B. Historical units of agencies of the first World War. Washington: National Archives of the United States, 1942