Smith, F. E. (1956). 633 Squadron. Hutchinson.
Lua i Stíl Chicago (17ú heag.)Smith, Frederick E. 633 Squadron. London: Hutchinson, 1956.
Lua MLA (8ú heag.)Smith, Frederick E. 633 Squadron. Hutchinson, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.