(1940). Flying and popular aviation. Ziff-Davis Pub. Co..
Lua i Stíl Chicago (17ú heag.)Flying and Popular Aviation. Chicago, Ill.: Ziff-Davis Pub. Co., 1940.
Lua MLA (8ú heag.)Flying and Popular Aviation. Ziff-Davis Pub. Co., 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.