Não informado. (1959). NASA Technical Memorandum. National Aeronautics and Space Administration.
Lua i Stíl Chicago (17ú heag.)Não informado. NASA Technical Memorandum. Washington: National Aeronautics and Space Administration, 1959.
Lua MLA (8ú heag.)Não informado. NASA Technical Memorandum. National Aeronautics and Space Administration, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.