Killebrew. The Royal Air Force in American Skies. University of North Texas Press.
Chicago-referens (17:e uppl.)Killebrew. The Royal Air Force in American Skies. University of North Texas Press.
MLA-referens (8:e uppl.)Killebrew. The Royal Air Force in American Skies. University of North Texas Press.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.