Libbey. Alexander P. de Seversky and the Quest for Air Power. University of Nebraska Press.
Lua i Stíl Chicago (17ú heag.)Libbey. Alexander P. De Seversky and the Quest for Air Power. University of Nebraska Press.
Lua MLA (9ú heag.)Libbey. Alexander P. De Seversky and the Quest for Air Power. University of Nebraska Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.