Gorrell, E. S. (1974). Gorrell's history of the American Expeditionary Forces Air Service: 1917 - 1919. National Archives and Records Service, General Services Administration.
Chicago-Zitierstil (17. Ausg.)Gorrell, Edgar S. Gorrell's History of the American Expeditionary Forces Air Service: 1917 - 1919. Washington: National Archives and Records Service, General Services Administration, 1974.
MLA-Zitierstil (9. Ausg.)Gorrell, Edgar S. Gorrell's History of the American Expeditionary Forces Air Service: 1917 - 1919. National Archives and Records Service, General Services Administration, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.